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in that period of time vs at that period of time

Both "in that period of time" and "at that period of time" are correct, commonly used phrases in English. They can be used interchangeably to refer to a specific time frame. The choice between the two depends on your personal preference or the context in which they are used.
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Explained by Jennifer
Editor at TextRanch

Last updated: August 08, 2024

in that period of time

This phrase is correct and commonly used in English to refer to a specific time frame.

This phrase is used to specify a particular period of time in the past, present, or future. It is interchangeable with "at that period of time."

Examples:

  • In that period of time, I was studying for my exams.
  • She achieved a lot in that period of time.
  • We will be traveling a lot in that period of time.
  • In that period of time Allen lost between 40-60% of his body's muscle mass and the broken down proteins were crushing his kidneys as a result. The doctors ...
  • The speaker is thinking about something that started but perhaps did not finish in that period of time. He/she is interested in the process as well as the result, and ...
  • I think probably family was a lot closer back in that period of time because you didn't have the distractions that you have these days. Um, they probably did more  ...
  • What other part of the world in that period of time has lifted 400 million people out of poverty? Jakie inne państwo w tym samym czasie wyprowadziło 400 mln ...

Alternatives:

  • at that period of time
  • during that period of time
  • within that period of time
  • over that period of time
  • throughout that period of time

at that period of time

This phrase is correct and commonly used in English to refer to a specific time frame.

This phrase is used to specify a particular period of time in the past, present, or future. It is interchangeable with "in that period of time."

Examples:

  • At that period of time, I was working on a project.
  • He was in school at that period of time.
  • We will be on vacation at that period of time.
  • Dec 16, 2015 ... “So far in this investigation, we have found no evidence of posting on social media by either of them at that period of time and thereafter ...
  • Dec 16, 2015 ... "So far in this investigation we have found no evidence of posting on social media — by either of them — at that period of time, and thereafter ...
  • To that effect, Time Magazine ran a story naming him the youngest talk show host in the country at that period of time. In 1970, Somers joined KPIX-TV in San ...
  • ... index fossils are distinctive, widespread, and lived briefly. Their presence in a rock layer can be used to identify rocks that were deposited at that period of time  ...

Alternatives:

  • in that period of time
  • during that period of time
  • within that period of time
  • over that period of time
  • throughout that period of time

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