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
one hour apart
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "one hour apart" is correct and usable in written English.
You can use it to describe the difference in timing between two events, activities, or points in time. For example: We left the restaurant and arrived at our destination one hour apart.
✓ Grammatically correct
Science
News & Media
Alternative expressions(20)
one week apart
one question apart
one night apart
one period apart
one day apart
one octave apart
one minute apart
one year apart
one month apart
at weekly intervals
one point apart
1 week apart
one km apart
one cycle apart
a week afterwards
one foot apart
separated by a week
seven days later
one inch apart
one week following
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
14 human-written examples
For example, stages 5 and 6 are on average one hour apart yet have a combined standard deviation greater than one hour.
Science
Chorioamnionitis, (defined as fever before or during labour as a temperature greater than 37.5°C on two occasion more than one hour apart or a temperature > 38.0°C with either uterine tenderness (or contractions), leucocytosis, maternal or fetal tachycardia, or a foul-smelling vaginal discharge in absence of any other cause of hyperpyrexia).
Science
Only one clock is infected here, but all follow a formula: they are each set exactly one hour apart.
News & Media
Each round of observation was spaced one hour apart.
Science
The CARIFS was self-administered twice, one hour apart.
For the purpose of comparison the original PGWBI and the new PGWB-S were self-administered by all students one hour apart.
Human-verified similar examples from authoritative sources
Similar Expressions
43 human-written examples
Unfortunately, this isn't very informative – the result for a burst of 4 successive observations one minute apart within an hour is the same as that for 4 observations spaced 15 mins apart.
It is sufficient to say that, for one particularly difficult stint, my mother was in one hospital and my grandmother was in a different one, about an hour apart, with my father attached to his oxygen tank at home.
News & Media
You can select a window of dates for publication and items can be published at regular intervals ranging between one hour and one month apart.
News & Media
Antipyretics were only allowed if two consecutive temperature measurements >38.5°C (oral) at least 1 hour apart from one another were documented, or if fever occurred after treatment with systemic antibiotics had been started.
Science
CIH is defined as a blood glucose (BG) level above 7.7 mmol/L on two occasions one to two hours apart, and infused insulin (Novalin R, Princeton, NJ, USA) is automatically initiated and titrated to achieve a BG level of 4.4 and 7.7 mmol/L via our nurse-driven algorithm in patients with CIH.
Science
Expert writing Tips
Best practice
Use "one hour apart" to clearly indicate a specific temporal separation between two events or measurements. For example, specify that "measurements were taken "one hour apart"" to ensure clarity in scientific or medical contexts.
Common error
Avoid using "one hour apart" when the context implies overlapping durations rather than distinct start times. Instead of saying "the classes are "one hour apart", implying a gap, specify the precise start and end times if they are back-to-back.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "one hour apart" functions as an adverbial phrase, modifying a verb or clause to indicate the temporal distance between two events or items. Ludwig AI confirms its standard grammatical role, as observed in various examples.
Frequent in
Science
50%
News & Media
43%
Wiki
7%
Less common in
Formal & Business
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "one hour apart" serves as a clear and concise way to describe a specific time interval between events, measurements, or items. Ludwig AI confirms that it's grammatically correct and commonly used in both scientific and news contexts. For alternatives, consider phrases like "separated by one hour" or "an hour distant" for slightly different nuances. When using this phrase, ensure that the context clearly indicates distinct events and avoid using it in scenarios with overlapping durations. By adhering to these guidelines, you can effectively use "one hour apart" to improve the clarity and precision of your writing.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
separated by one hour
Changes the structure to emphasize the action of separation.
one hour in between
Uses a more conversational tone with "in between".
with a one-hour gap
Indicates a gap in time using "gap".
an hour distant
Replaces "apart" with "distant", focusing on separation in time.
one hour's interval
Uses "interval" to denote the gap between two points in time.
one hour's difference
Highlights the difference in time using "difference".
at an hourly separation
Emphasizes the hourly nature of the separation using "hourly".
hourly spaced
Focuses on the spacing of events or items using "spaced".
one hour elapsing
Emphasizes the passing of time with "elapsing".
an hour's remove
Uses "remove" to express separation in a more formal way.
FAQs
How can I use "one hour apart" in a sentence?
You can use "one hour apart" to describe events or measurements separated by a specific amount of time. For instance, "The two meetings were scheduled "one hour apart"".
What are some alternatives to saying "one hour apart"?
Alternatives include phrases like "separated by one hour", "an hour distant", or "with a one-hour gap", depending on the nuance you want to convey.
Is it better to say "one hour apart" or "separated by one hour"?
Both "one hour apart" and "separated by one hour" are grammatically correct and widely accepted. The choice between them often comes down to stylistic preference or the specific context of the sentence.
When is it inappropriate to use the phrase "one hour apart"?
Avoid using "one hour apart" when describing events that overlap or when precision is needed regarding start and end times. In such cases, specify exact times instead.
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
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested