for a 4-days period vs for a 4-day period

Both phrases are correct, but they are used in slightly different contexts. 'For a 4-day period' is more commonly used and is the preferred choice when referring to a specific duration of time. 'For a 4-days period' is less common and may sound awkward to native speakers.

Last updated: March 30, 2024 • 806 views

for a 4-days period

This phrase is not commonly used in English and may sound awkward to native speakers.

It is more appropriate to use 'for a 4-day period' when referring to a specific duration of time.

Show examples from the web [+]

He's gone from a 4-day cooling off period to only two days between kills.
He's also accelerating's gone from a 4-day cooling off period to only two days between kills.
They took the same flight back after a 4-day stay.
They took the same flight back after a 4-day stay.
And today is the first day of a 4-day event to commemorate the bombing at the school.
We should start with agents who work a 4-day, 40-hour week, given the fact that most of the murders happened over a long weekend, which means if the unsub traveled by car, no one at work would've missed them.
"students of Acadia high school embarked on a 4-day walk"to coincide with Martin Luther King, Jr.'s
In a speech given in the German city of Cologne during a 4-day state visit, the Turkish Prime Minister Recep Tayyip Erdogan urged the Turks living in Germany to resist assimilation into the German community.
We should start with agents who work a 4-day, 40-hour week, given the fact that most of the murders happened over a long weekend, which means if the unsub traveled by car, no one at work would've missed them.
There is no experience with administration of intravenous levetiracetam for longer period than 4 days.
Your rapporteur regards the proposed period of 4 days to be unjustified and insufficient in matters of such importance and complexity.
Children start showing symptoms of meningitis after a probable incubation period of about 2-4 days and clinical manifestations tend to evolve rapidly.
Following an incubation period of about 3-4 days, a variety of gastrointestinal symptoms appear, ranging from mild to severe bloody diarrhoea, mostly without fever.
There is no experience with administration of intravenous levetiracetam for a longer period than 4 days.
The pre-culture is incubated under the conditions of the test and used when still exponentially growing, normally after an incubation period of 2 to 4 days.
In persistent allergic rhinitis (presence of symptoms for 4 days or more per week and for more than 4 weeks), continued treatment may be proposed to the patients during the allergen exposure periods.
When a consultation of the Coordination Group is requested by a Member State, it shall be arranged within 4 days of the request at most, unless the Member State agrees to a longer period.

Alternatives:

for a 4-day period
for a period of 4 days
over a 4-day period
during a 4-day period
across a 4-day period

for a 4-day period

This phrase is correct and commonly used when referring to a specific duration of time.

Use 'for a 4-day period' when specifying the length of time something will last or occur.

Show examples from the web [+]

He's gone from a 4-day cooling off period to only two days between kills.
He's also accelerating's gone from a 4-day cooling off period to only two days between kills.
They took the same flight back after a 4-day stay.
They took the same flight back after a 4-day stay.
And today is the first day of a 4-day event to commemorate the bombing at the school.
We should start with agents who work a 4-day, 40-hour week, given the fact that most of the murders happened over a long weekend, which means if the unsub traveled by car, no one at work would've missed them.
"students of Acadia high school embarked on a 4-day walk"to coincide with Martin Luther King, Jr.'s
In a speech given in the German city of Cologne during a 4-day state visit, the Turkish Prime Minister Recep Tayyip Erdogan urged the Turks living in Germany to resist assimilation into the German community.
We should start with agents who work a 4-day, 40-hour week, given the fact that most of the murders happened over a long weekend, which means if the unsub traveled by car, no one at work would've missed them.
There is no experience with administration of intravenous levetiracetam for longer period than 4 days.
Your rapporteur regards the proposed period of 4 days to be unjustified and insufficient in matters of such importance and complexity.
Children start showing symptoms of meningitis after a probable incubation period of about 2-4 days and clinical manifestations tend to evolve rapidly.
Following an incubation period of about 3-4 days, a variety of gastrointestinal symptoms appear, ranging from mild to severe bloody diarrhoea, mostly without fever.
There is no experience with administration of intravenous levetiracetam for a longer period than 4 days.
The pre-culture is incubated under the conditions of the test and used when still exponentially growing, normally after an incubation period of 2 to 4 days.
In persistent allergic rhinitis (presence of symptoms for 4 days or more per week and for more than 4 weeks), continued treatment may be proposed to the patients during the allergen exposure periods.
When a consultation of the Coordination Group is requested by a Member State, it shall be arranged within 4 days of the request at most, unless the Member State agrees to a longer period.

Alternatives:

for a period of 4 days
over a 4-day period
during a 4-day period
across a 4-day period

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for a 4-days period vs for a 4-day period