once a week vs once in a week

Both 'once a week' and 'once in a week' are correct, but 'once a week' is more commonly used in English. They both convey the same meaning of something happening once every week.

Last updated: September 01, 2026 • 6031 views

This phrase is correct and commonly used in English to indicate something happening once every week.

"once a week"

This phrase is used to express the frequency of an event happening once every week. It is a common and natural way to convey this idea.

Examples:

I go to the gym once a week.
We have a team meeting once a week.
She visits her grandmother once a week.
The garbage is collected once a week.
They water the plants once a week.

Show examples from the web [+]
Last updated: November 05, 2024

Nov 9, 2022 ... Mostly I boulder once a week, occasionally twice. I've climbed on and off for a few years, so not a total beginner. Had some moderate gains ...
Feb 4, 2022 ... Semaglutide once a week in adults with overweight or obesity, with or without type 2 diabetes in an east Asian population (STEP 6): a randomised ...
Jan 26, 2024 ... I am 37F and overweight, and not in shape. I started crossfit back in October. I go once a week since then, but I do not feel any progress (my ...
Jan 4, 2024 ... ... once a week for free. Visit AnnualCreditReport.com to request free copies of your credit reports. Other sites may charge you or be ...
Dec 14, 2025 ... about it: If you post once a week, you end up with four posts in a month. Even if each post gets only around 500 impressions, that's roughly ...
Feb 4, 2025 ... Exenatide once a week versus placebo as a potential disease-modifying treatment for people with Parkinson's disease in the UK: a phase 3 ...
Dec 18, 2025 ... ... once a week for 5 weeks at higher weekly doses? A burning question I forgot to ask the radiation oncologist was whether or not a single ...

Alternatives:

weekly
every week
once per week
once every week
once weekly

This phrase is correct but less commonly used in English compared to 'once a week'.

"once in a week"

This phrase also indicates something happening once every week, but it is less common and may sound slightly less natural than 'once a week'.

Examples:

I have a cheat meal once in a week.
They clean the house once in a week.

Show examples from the web [+]

It was a very small village - a weekly bazaar where people, just once in a week, they put in all the vats.
Each of our returnees will check in once a week.
They come in once a week... but they never find anything.
I used to have a manicure once a week in Rajputan.
We practice once a week in uniform.
Mr. John Lambert is one such who preaches once a week in London to large audiences.
She comes in here once a week... to brief the Senate Intelligence Committee.
He drops in here once a week...
He drops in here once a week... behavioral therapy.
Turn in her passports, sign in once a week at the local police station, promise not to leave Newfoundland, and avoid contact with these people.
Thousands of people, especially in a bad economy, they send their gold in once a week.
There's a housekeeping service that comes in once a week, but otherwise it's empty.
He called his daughter in Canada once a week, the odd call to a few friends.
Therefore, it is recommended that the platelet count be determined at least once a week in these patients.
Water for bathing should be provided at least once a week in shallow trays with water of approximately 0,5 to 1 cm in depth.
One group of people just met for an hour-and-a-half once a week in a support group.
He came in once or twice a week to help out.
You know, what I'm trying to understand is that for over a year, you have been meeting with my mother once a week in Terre Haute, Indiana...
She was a voluble, untidy woman who made her own clothes and washed once a week in the water wrung out of the laundry.
However, delivery or collection from producers to packing centres only may take place once a week in those cases where ambient temperatures at which eggs are kept at the farm do not exceed 18 ºC.

Alternatives:

once a week
weekly
every week
once per week
once every week

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once a week vs once in a week

"once a week"

"once in a week"

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