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
demand a substantial timeframe
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "demand a substantial timeframe" is correct and usable in written English.
You can use it when referring to a request or requirement for a significant amount of time to complete a task or project. Example: "In order to ensure quality results, we must demand a substantial timeframe for the completion of this project."
✓ Grammatically correct
Alternative expressions(20)
require considerable time
require a considerable duration
require a significant duration
take a considerable amount of time
take up a lot of time
be very time-consuming
take a long time
stretch out for quite a while
take a great deal of time
take a significant amount of time
demand a lot of time
take a large amount of time
take a huge amount of time
requires considerable time
require further time
take a prohibitive amount of time
require substantial time
take a fair amount of time
consume a substantial period
demand significant duration
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
Applying to a fellowship demands a substantial, polished, well-thought-out product.
However, the design had armor which was considered too thin, demanding a substantial redesign.
Wiki
The armour of their design was considered too thin, demanding a substantial redesign.
Wiki
The necessary initial major loss of body weight demands a substantial reduction in energy intake.
Science
NFF president Brent Finlay will accompany Abbott and Joyce on the tour and though he is hopeful a package will be announced soon, he did not demand a timeframe.
News & Media
This current demand has been reinforced by a substantial demand for stock-piling purposes.
Formal & Business
There is certainly nothing in petitioner's telegram 10 which makes out a substantial demand for an executive session.
Academia
They get media on demand, and typically at a substantial discount to expensive cable bundles.
News & Media
This clearly indicates a substantial demand-supply gap.
Science
Publicity for food products has increased and has had a substantial effect on demand.
Looking to the medium term, there is every reason to expect a substantial expansion in demand.
Expert writing Tips
Best practice
Use “demand a substantial timeframe” in situations where there is a justified and unavoidable need for an extended period. Avoid using it when a shorter timeframe could suffice.
Common error
Avoid using "demand a substantial timeframe" if the need for an extended duration isn't fully justified. Overstating your time requirements can undermine trust and credibility.
Source & Trust
60%
Authority and reliability
3.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "demand a substantial timeframe" functions as a declarative statement expressing the necessity for a significant duration to complete a task. Although Ludwig has no exact examples, the structure implies a requirement for ample time allocation.
Frequent in
Science
0%
News & Media
0%
Formal & Business
0%
Less common in
Science
0%
News & Media
0%
Formal & Business
0%
Ludwig's WRAP-UP
The phrase "demand a substantial timeframe" is a grammatically correct way to emphasize the need for a significant duration for a project or task. As per Ludwig, this phrase, while valid, currently lacks extensive real-world usage examples. When employing it, ensure that you justify the demand with specific reasons and context. Alternatives such as "require considerable time" or "necessitate an extended duration" may offer slightly different nuances. Avoid overstating time needs to maintain credibility, and use this phrase primarily in professional contexts where clarity and precision are valued.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
Demand a considerable duration
Similar in structure, but replaces 'substantial' with 'considerable'.
Require a significant timeframe
Uses 'require' instead of 'demand', softening the tone slightly.
Need ample time
Suggests sufficient time is crucial for completion.
Require considerable time
Focuses on the necessity of a large time allocation.
Necessitate an extended duration
Highlights the length of time needed, using more formal language.
Entail a prolonged timeline
Highlights the extended nature of the project's duration.
Call for a significant period
Emphasizes the importance of the time involved.
Call for an extended period
Similar to 'Call for a significant period' but emphasizes the length.
Impose a lengthy schedule
Suggests that the timeframe is being dictated by some external factor.
Warrant a lengthy schedule
Implies that the task justifies a long schedule.
FAQs
How can I use "demand a substantial timeframe" in a sentence?
You can use "demand a substantial timeframe" when emphasizing the necessity of allotting considerable time to complete a project successfully. For example, "Completing this complex research project will "demand a substantial timeframe"".
What are some alternatives to "demand a substantial timeframe"?
Alternatives include phrases such as "require considerable time", "necessitate an extended duration", or "call for a significant period", depending on the nuance you wish to convey.
When is it appropriate to use "demand a substantial timeframe"?
It's appropriate when the task genuinely needs an extended duration and you want to emphasize that point. It's best used in formal or professional contexts where clearly outlining time expectations is crucial.
What's the difference between "demand a substantial timeframe" and "require a substantial timeframe"?
"Demand a substantial timeframe" implies a stronger insistence on the time needed, whereas "require a substantial timeframe" is a more neutral way of expressing the need for ample time.
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
60%
Authority and reliability
3.8/5
Expert rating
Real-world application tested