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
vast hours
Grammar usage guide and real-world examplesUSAGE SUMMARY
"vast hours" is correct and can be used in written English.
You can use it to describe how long something took or how long something will take to complete. For example, "It took me vast hours of practice to become an expert pianist."
✓ Grammatically correct
News & Media
Academia
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
3 human-written examples
For deep thinkers, academics and ardent internet quackers, any discourse on "identity" can vacuum up vast hours of precious life.
News & Media
It is an epidemic that costs organizations millions of lost hours and billions in lost revenue, particularly when we consider the vast hours leaders spend undoing conflict, much of which they've inadvertently (or occasionally even purposely) set up as a misguided ploy to show strength.
News & Media
First, enough baseline talent to be able to transform the vast hours of observed boredom into breezy airport newsagent spy thriller prose.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
57 human-written examples
We tend to think of 1967's Summer of Love as revolving around music: kicked off by the vast 14 Hour Technicolor Dream concert at Alexandra Palace, London, soundtracked by Sgt Pepper, The Piper at the Gates of Dawn and Are You Experienced?, and perhaps symbolically drawn to a conclusion when Engelbert Humperdinck unseated Scott McKenzie's San Francisco from the top of the charts.
News & Media
This was supposed to be a vast 24-hour supermarket, surrounded by hundreds of new homes.
News & Media
It will be huge, a vast 24-hour, 6-day-a-week garbage churning factory with a footprint only slightly smaller than that of the Empire States Building.
News & Media
Somehow, this mythical Commonwealth of the future will cost less than the EU in terms of the vast number of hours required to negotiate its treaties and other formal agreements; it will not require members to make significant concessions in return for some collective good; and it will have only the most rudimentary of mechanisms to enforce its will.
News & Media
I suspect that in 2009 (nearly 2010!) the vast majority of hours will be sunk into online ranked matches, as it should be.
News & Media
For example, possessing "good judgment" under pressure may be a better predictor of success as a law firm partner than the ability to bill a vast amount of hours.
Academia
The Madridistas had watched the Champions League final on a four-sided giant screen perched on the halfway line on Saturday, and they returned to the stadium in vast swathes 24 hours later.
News & Media
Personality -- Let's be honest, personality does play a part here -- after all you will be spending vast amount of hours with this person, so you want to make sure there isn't a personality conflict.
News & Media
Expert writing Tips
Best practice
Use "vast hours" when you want to emphasize the sheer volume of time dedicated to something, particularly when it feels almost immeasurable. It's suitable for describing effort, dedication, or the duration of a task.
Common error
While "vast hours" is grammatically sound, avoid using it in overly casual settings where simpler phrases like "a lot of time" or "many hours" would be more appropriate. Reserve it for situations where you want to convey a sense of significant time investment or duration.
Source & Trust
88%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "vast hours" functions as an adjective phrase modifying a noun. "Vast" is an adjective that describes the quantity of "hours", indicating a significant or extensive amount of time. Ludwig AI confirms its correctness in written English.
Frequent in
News & Media
66%
Academia
17%
Science
17%
Less common in
Formal & Business
0%
Wiki
0%
Encyclopedias
0%
Ludwig's WRAP-UP
In summary, "vast hours" is a grammatically sound phrase used to emphasize a significant amount of time spent on something. Ludwig AI confirms its validity. It functions as an adjective phrase, where "vast" modifies "hours". While suitable for neutral and even some formal contexts like news and academia, it is relatively rare. Consider alternatives like "considerable time" or "extensive time" depending on the specific context. When using "vast hours", make sure to convey the effort and dedication involved.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
Extensive time
Similar to "vast", but using a synonym that may fit better in certain contexts.
Numerous hours
Focuses on the quantity of hours rather than the abstract concept of vastness.
Considerable time
Replaces "vast" with "considerable", focusing on the substantial nature of the time spent.
Countless hours
Implies the hours are so many they are difficult to count.
Innumerable hours
Similar to countless hours, suggesting a very large, indefinite number of hours.
A great deal of time
Emphasizes the amount of time involved in a general way.
Significant duration
Emphasizes the length of time using more formal language.
Long stretch of time
Uses a more descriptive phrase to indicate a considerable duration.
Substantial amount of time
Uses more formal language to convey the significant quantity of time.
Prolonged period
Highlights the extended nature of the time frame.
FAQs
How can I use "vast hours" in a sentence?
You can use "vast hours" to describe the amount of time spent on a task or activity, such as, "It took "vast hours" of practice to master the piano concerto."
What are some alternatives to saying "vast hours"?
Alternatives to "vast hours" include "considerable time", "extensive time", or "significant duration". The best choice depends on the specific context.
Is it correct to say "vast amount of hours" instead of "vast hours"?
While grammatically understandable, "vast hours" is more concise and common. "Vast amount of hours" is less idiomatic and can sound redundant since "vast" already implies a large quantity.
In what situations is "vast hours" most appropriate?
"Vast hours" is most appropriate when you want to emphasize the large quantity of time dedicated to a task or activity, particularly when it involves significant effort or dedication. It's suitable for both formal and neutral contexts.
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
88%
Authority and reliability
4.1/5
Expert rating
Real-world application tested