Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
the identical time span
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "the identical time span" is correct and usable in written English.
It can be used when referring to two or more time periods that are exactly the same in duration. Example: "The two experiments were conducted over the identical time span of six weeks to ensure consistency in results."
✓ Grammatically correct
Science
News & Media
Formal & Business
Alternative expressions(2)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified similar examples from authoritative sources
Similar Expressions
60 human-written examples
Importantly, prognostic evidence and validated longitudinal evidence for biomarkers of aging usually relate to an overlapping but not identical time span in the life of the animals.
Science
We have already discussed in the Introduction that these two lines of evidence for biomarkers of aging usually relate to an overlapping but not identical time span in the life of the animals.
Science
Moreover, this observational study tackled the issue of duration of ICU stay being associated with a higher likelihood of additional complications and higher amounts of nutritional intake by analyzing nutrition given over identical time spans of 3, 5, 7, 10, and 14 days.
Science
This means they are assumed to be independent of the solar cycle phase and thus identical in the 1960s and the years 2000 2010, which is the time span from which the model coefficients have been derived.
Science
The time span suggested a possible identity for the corpses.
News & Media
But, in human terms, the time span is very different.
News & Media
The time span of the offers varies by country.
News & Media
The time span of the experiment is only one year.
Science
The time span of the study ran from 2005 through 2009.
Science
Look for the program that offers the right time span.
News & Media
ArcSight increased 62% over the same time span.
News & Media
Expert writing Tips
Best practice
When using "the identical time span", ensure it's clear what events or processes are being compared over that specific duration. Provide context to highlight why the time frame is significant.
Common error
Avoid using "the identical time span" when you mean overlapping or similar time periods. "Identical" implies exact matching, so use terms like "overlapping periods" or "similar durations" when the time frames are not precisely the same.
Source & Trust
75%
Authority and reliability
3.9/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "the identical time span" functions as a noun phrase, specifying a particular duration. Though Ludwig AI indicates correctness, its relative infrequency suggests more common alternatives might be preferred in general writing.
Frequent in
Science
0%
News & Media
0%
Formal & Business
0%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
The phrase "the identical time span" is grammatically sound but rarely used. It is used to denote a very specific, precisely matched duration. Although Ludwig AI confirms the phrase's correctness, its infrequency suggests considering more common alternatives, such as "the same time frame" or "the equivalent duration", depending on the context. When using the phrase, ensure clarity about the events being compared and why the exact duration is significant.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
the same time frame
Replaces "span" with "frame", emphasizing the temporal boundary.
the equivalent duration
Substitutes "identical" with "equivalent" and "time span" with "duration", focusing on the length of time.
the equal period
Uses "equal" instead of "identical" and "period" instead of "time span", indicating a matching interval.
the matching time interval
Replaces "identical" with "matching" and "span" with "interval", highlighting the correspondence of the time period.
the congruent time length
Substitutes "identical" with "congruent" and "span" with "length", indicating agreement in temporal extent.
the uniform timeframe
Uses "uniform" to mean identical and "timeframe" to mean the period in which something takes place.
the corresponding period
Focuses on the relationship between two periods that are similar or connected.
the synchronous duration
Indicates events happening at the same time and lasting for the same length.
the duplicate time period
Uses "duplicate" to stress that two different time periods are exactly the same.
the replicated length of time
Highlights the repeated nature of the duration.
FAQs
How can I use "the identical time span" in a sentence?
Use "the identical time span" to compare events or processes that occur over exactly the same duration. For example, "Both experiments were conducted over the identical time span to ensure comparable results."
What's a good alternative to "the identical time span"?
Alternatives include "the same time frame", "the equivalent duration", or "the equal period", depending on the context.
Is it better to say "the same time span" or "the identical time span"?
"The identical time span" implies a precise match in duration, while "the same time span" can sometimes be used more loosely. Choose "identical" when accuracy is important.
What does "identical" really mean in "the identical time span"?
In "the identical time span", "identical" means that the beginning and end points of the time duration are exactly the same. It signifies a precise and unwavering correspondence between the two periods being compared.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
75%
Authority and reliability
3.9/5
Expert rating
Real-world application tested