at period

USAGE SUMMARY

The phrase 'at period' is not correct in written English.
To be correct, you would need to use the phrase 'at a certain point in time', or if you are speaking about punctuation, you could use 'at a period', as in "I need to clarify this idea by putting a period at a period."

⚠ May contain grammatical issues

Science

News & Media

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

The period that tends to be forgotten when we look at period drama is our own.

The New York Times

Expected workforce reliability for maintenance activity k at period t.

Journal of Industrial Engineering International

Budgeted workforce cost for maintenance activity k at period t.

Journal of Industrial Engineering International

Cost of one unit of lost sale at period t.

Journal of Industrial Engineering International

Holding cost of each unit of inventory at period t.

Journal of Industrial Engineering International

Cost of one unit of backlog at period t.

Journal of Industrial Engineering International

Available budget for plant i at period t.

Journal of Industrial Engineering International

Amount of production in plant i at period t.

Journal of Industrial Engineering International

Demand of distribution center s at period t.

Journal of Industrial Engineering International

where is the expected reward of secondary user at period.

EURASIP Journal on Wireless Communications and Networking

Fig. 6 shows that stored energy of the storage plant reaches its lower limit at period 23 and 39, and it reaches the upper limit at period 74.

Journal of Modern Power Systems and Clean Energy

Expert writing Tips

Best practice

Avoid using the phrase "at period" in formal writing. Instead, opt for grammatically correct alternatives like "during the period" or "in that period" to ensure clarity and professionalism.

Common error

A common mistake is to use "at" to indicate duration, which is grammatically incorrect in the context of time periods. Remember that "at" typically refers to a specific point in time, while "during" or "in" are more appropriate for indicating a span of time.

Linguistic Context

The phrase "at period" functions as an incorrect prepositional phrase attempting to specify a timeframe. The preposition "at" is misused, as it typically indicates a specific point in time rather than a duration. Ludwig indicates that it's not correct in written English.

Expression frequency: Very common

Frequent in

Science

75%

News & Media

15%

Formal & Business

10%

Less common in

Encyclopedias

0%

Wiki

0%

Reference

0%

Ludwig's WRAP-UP

While the phrase "at period" appears frequently, especially within scientific literature, Ludwig AI indicates that it is grammatically incorrect. The issue lies in the misuse of the preposition "at" when referring to a duration rather than a specific point in time. As such, it is crucial to use alternatives like "during the period", "in that period", or "within the period" to maintain grammatical correctness and clarity. Failing to do so compromises the professional quality of writing, even if the phrase's usage is relatively widespread in certain contexts. So, always opt for grammatically sound alternatives.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

during the period

Replaces "at" with "during" for better grammatical flow and emphasizes the duration.

in that period

Uses "in" instead of "at" to specify inclusion within a timeframe.

within the period

Similar to "in that period" but more formal, indicating confinement within a specific timeframe.

at that time

Shifts the focus to a specific point in time rather than a duration.

at this stage

Emphasizes a particular point in a process or development.

over the duration

Highlights the entirety of the period under consideration.

throughout the period

Indicates something occurring continuously from the beginning to the end of the period.

during that phase

Uses "phase" instead of "period," often implying a stage in a larger process.

in the timeframe

Focuses on the specified block of time.

while that lasted

Emphasizes the time something was ongoing.

FAQs

Why is "at period" considered grammatically incorrect?

The preposition "at" typically denotes a specific point in time, not a duration. When referring to a span of time, it's more appropriate to use prepositions like "during" or "in".

What can I say instead of "at period"?

You can use alternatives like "during the period", "in that period", or "within the period" depending on the context.

Is there a situation where "at period" could be correct?

While highly unusual, you might use "at a period" when referring to the punctuation mark. For instance, "I need to ensure I put a period at a period".

How does the context influence the best alternative to "at period"?

The most suitable alternative depends on whether you're emphasizing inclusion within a timeframe, duration, or a specific point within a process. Choose phrases like "during the period" for duration, or "at that time" for a specific moment.