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
upon hour of
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "upon hour of" is not correct and not usable in written English.
It seems to be an incorrect combination of words that does not convey a clear meaning. Example: "Upon hour of the meeting, we will discuss the agenda."
⚠ May contain grammatical issues
News & Media
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
21 human-written examples
With hour upon hour of practise of course.
News & Media
Good test scores now reflect both socioeconomic status (perhaps they always have) and hour upon hour of test preparation.
News & Media
What they are doing is magic, and, because it is magic, it requires hour upon hour of hard work.
News & Media
But as Higgins's later books crept to double that length, the trick turned tiresome, like watching hour upon hour of juggling.
News & Media
Engaging with a current top-end game involves much more cognitive processing (a k a brainpower) than merely watching hour upon hour of prime-time television.
News & Media
After "months of too much champagne and hour upon hour of dark, airless snooker matches," she longs for the "quiet normalcy" of her previous life.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
38 human-written examples
A succession of astonishing images, inspired front pages, souvenir supplements, pithy tweets and hour-upon-hour of live action not only shook up viewing habits - giving BBC One it's biggest ever lead over ITV1 so far this year, and sending record audiences to Channel 4. It also boosted newspaper sales by an estimated 1m copies and transformed attitudes to sport, disability and Britain itself.
News & Media
"They save us hours upon hours of labor.
News & Media
Hours upon hours of trying hundreds of possibilities and I finally waved the white flag.
News & Media
The recent insider trading investigations have generated hours upon hours of billable work.
News & Media
At the same time, many people devote hours upon hours of unpaid time to pimping their ride, because they understand their vehicle as a statement of identity.
News & Media
Expert writing Tips
Best practice
Avoid using the phrase "upon hour of" in formal writing. Use alternatives like "during the hour" or "for hours" to maintain grammatical correctness.
Common error
Do not use "upon" when simply indicating a duration or period of time. "Upon" typically indicates a condition or event that triggers another. Instead of "upon hour of", consider using "during the hour of" or rewording to "for several hours".
Source & Trust
88%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "upon hour of" functions as a prepositional phrase attempting to denote a period of time. However, Ludwig AI indicates it is grammatically incorrect. Its usage often aims to describe activities performed over a certain duration.
Frequent in
News & Media
100%
Less common in
Science
0%
Formal & Business
0%
Wiki
0%
Ludwig's WRAP-UP
The phrase "upon hour of" is a grammatically incorrect prepositional phrase often intended to indicate the duration of an activity. Despite its frequent appearance in various news and media sources, Ludwig AI flags it as non-standard English. To maintain grammatical accuracy, it's advisable to use alternatives like "for hours", "during the hour", or "at the hour of". While the phrase's presence in numerous sources might suggest common usage, it's important to prioritize grammatical correctness, especially in formal contexts.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
for hours
This alternative indicates duration but does not include "upon" or "hour".
hour after hour
Emphasizes the continuous passage of time.
for a period of hours
More formal; specifies a duration using "hours".
over many hours
Indicates an extended period of time.
during the hour
Focuses on something happening during a specific hour.
lasting several hours
Expresses the duration of an event.
at the hour of
Indicates a precise time.
within the hour
Implies something must happen before the end of a given hour.
hourly
Describes something happening or repeating every hour.
every hour
Similar to 'hourly', emphasizing repetition.
FAQs
How can I correctly use "hour" in a sentence about time?
Use phrases such as "for hours", "during the hour", or "at the hour of" to properly indicate duration or a specific point in time.
What are some alternatives to saying "upon hour of"?
Instead of "upon hour of", you can use phrases like "for hours", "during the hour", or "at the hour of" depending on the intended meaning.
Is "upon hour of" grammatically correct?
No, "upon hour of" is not grammatically correct. It is an incorrect combination of words. Consider using "for hours" or "during the hour" instead.
What is the difference between "upon hour of" and "for hours"?
"Upon hour of" is not a standard English phrase and is grammatically incorrect. "For hours" correctly expresses a duration of 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
88%
Authority and reliability
2.8/5
Expert rating
Real-world application tested