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
an extensive period
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase 'an extensive period' is correct and usable in written English.
You can use it to refer to a length of time that is long or extended, either literally or metaphorically. For example: "The author spent an extensive period of research before writing their latest book."
✓ Grammatically correct
News & Media
Science
Formal & Business
Alternative expressions(20)
a prolonged duration
a considerable timeframe
a lengthy interval
a prolonged period
a protracted time
a substantial stretch of time
a long spell
a significant duration
a drawn-out process
a good while
an extensive month
an extensive stage
an extensive item
an extensive length
an intense period
an intensive period
an extensive age
an extensive timeframe
an extensive duration
an extensive half
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
58 human-written examples
City required an extensive period to get accustomed to it.
News & Media
The foreign players feel more comfortable being treated at home, especially if there is an extensive period of recuperation.
News & Media
In response to two pages of written questions from Reuters, a lawyer for Epstein said the financier's philanthropy has been widespread for an extensive period of time.
News & Media
Stottlemyre told club officials in March that he was likely to leave the team for an extensive period during the season.
News & Media
"What that means is that it has been quite an extraordinary raid, over an extensive period of time, in extraordinary circumstances during an election campaign," he told the Nine Network.
News & Media
The employee also usually remains unsettled and in temporary housing for an extensive period of time, she said, because the buying process usually takes much longer than finding a house to rent.
News & Media
It could also be a major part of New York's season if El Duque is out for an extensive period, especially if the Yankees eventually try the suspect Dwight Gooden in the rotation.
News & Media
The manufacturers claim that the Jabulani is the "roundest ball ever produced" following an extensive period of development at Loughborough University, although it has prompted a sceptical response from goalkeepers.
News & Media
"This includes publication of a full impact assessment detailing the new system's costs and benefits, a comprehensive round of user-testing, an extensive period of consultation and adequate time for HMRC to take on board required changes".
News & Media
During an extensive period of consulting in career coaching and organisational development, he has helped people to successfully manage a difficult boss and find a way to deliver improved results and secure a promotion.
News & Media
Indeed, their injury list has been so extensive it would be quicker to list the players who didn't feature on it for an extensive period than those that did.
News & Media
Expert writing Tips
Best practice
When using "an extensive period", consider the context to ensure it accurately conveys the intended duration. It's suitable for formal and informal settings, but be mindful of the specific nuance you want to express.
Common error
Avoid using "an extensive period" when you actually mean a period of intense activity or emotion. "Extensive" refers to length or scope, not intensity. Instead, consider using phrases like "an intense phase" or "a highly active time".
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "an extensive period" functions as a noun phrase, where "extensive" modifies the noun "period". Ludwig AI indicates the phrase is grammatically sound and suitable for describing prolonged durations across various contexts.
Frequent in
Science
32%
News & Media
30%
Formal & Business
10%
Less common in
Encyclopedias
2%
Wiki
5%
Reference
0%
Ludwig's WRAP-UP
In summary, "an extensive period" is a grammatically correct and widely used phrase to describe a long duration. As Ludwig AI confirms, it appears across diverse contexts, including science, news, and formal writing. While phrases like "a prolonged duration" or "a considerable timeframe" can serve as alternatives, "an extensive period" effectively conveys a significant length of time. Remember to use "extensive" to denote duration and scope rather than intensity, ensuring clarity in your writing. Overall, this phrase is a valuable tool for clearly expressing timeframes in various contexts.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
a prolonged duration
Replaces "extensive period" with synonyms that emphasize length and continuation.
a considerable timeframe
Substitutes "extensive" with "considerable" and "period" with "timeframe", focusing on the substantial nature of the duration.
a lengthy interval
Uses "lengthy" instead of "extensive" and "interval" for "period", highlighting the duration's span.
a protracted time
Replaces "extensive" with "protracted", indicating a drawn-out duration.
a substantial stretch of time
Emphasizes the amount of time with "substantial stretch", making the duration feel significant.
a long spell
Uses "long spell" to suggest a continuous period, differing slightly in tone.
an extended phase
Replaces "period" with "phase", implying a stage or segment that is prolonged.
a significant duration
Focuses on the importance of the length of time.
a drawn-out process
Replaces "period" with "process", applicable when referring to a series of actions over a long duration.
a good while
Uses a more informal tone to indicate a considerable amount of time.
FAQs
How can I use "an extensive period" in a sentence?
You can use "an extensive period" to describe a long duration, such as "The research required "an extensive period" of data collection" or "She lived abroad for "an extensive period" of time".
What can I say instead of "an extensive period"?
You can use alternatives like "a prolonged duration", "a considerable timeframe", or "a lengthy interval" depending on the context.
Which is correct, "an extensive period" or "an intensive period"?
Both phrases are correct, but they have different meanings. "An extensive period" refers to a long duration, while "an intensive period" refers to a time of high activity or focus. Choose the phrase that accurately reflects the meaning you intend to convey.
What's the difference between "an extensive period" and "a prolonged period"?
"An extensive period" and "a prolonged period" are very similar in meaning, both indicating a long duration. "Extensive" emphasizes the scope or breadth of the period, while "prolonged" emphasizes its extended nature. The choice between them often depends on stylistic preference.
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
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested