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
by time
Grammar usage guide and real-world examplesUSAGE SUMMARY
"by time" is correct and usable in written English.
You can use it to refer to the progression of events over time; for instance, "Their skills have improved by time".
✓ Grammatically correct
News & Media
Science
Wiki
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
51 human-written examples
Hatred of Ovitz seems undiminished by time.
News & Media
He is a man obsessed by time.
News & Media
Only principles remain untouched by time.
News & Media
No more being called "demigod" by Time.
News & Media
"These practices have been proven by time".
News & Media
I'm fascinated by time.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
9 human-written examples
*Region-by-time interaction effects.
Science
Avoid retransmissions by time-outs.
But meeting value today is destroyed by time-to-start.
News & Media
Development was monitored by time-lapse microscopy.
Science
Synergism was evaluated by time-kill studies.
Expert writing Tips
Best practice
Use "by time" to indicate that something is influenced, measured, or determined by the passage of time or a specific point in time. For instance, "Changes in the data were tracked by time of day."
Common error
Avoid using "by time" when "in time" is more appropriate. "In time" suggests eventually or before a deadline, whereas "by time" indicates a relationship or measurement relative to time. For example, say "The project must be completed in time for the deadline" not "by time".
Source & Trust
79%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "by time" primarily functions as a prepositional phrase indicating a temporal relationship. This can denote measurement, influence, or change in relation to the passage of time or a specific moment. Ludwig examples show usage across various domains.
Frequent in
News & Media
62%
Science
23%
Wiki
9%
Less common in
Formal & Business
3%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "by time" functions as a prepositional phrase denoting a temporal relationship, commonly used to express influence or measurement relative to the passage of time. It's grammatically correct and widely employed across different contexts, as confirmed by Ludwig. While often confused with "in time", understanding the subtle difference is crucial for precise writing. Remember, "by time" indicates a temporal dependency, whereas "in time" implies eventual completion or timeliness. With its prevalent usage in news, science, and general writing, mastering "by time" enhances clarity and precision in your writing.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
with time
Implies that something will be accomplished as time passes.
over time
Indicates a gradual change or development during an extended period.
with the passage of time
Emphasizes the influence of the progression of time on a particular outcome or situation.
as time goes by
Highlights the continuous flow of time and its impact.
in due course
Suggests that something will happen at the appropriate or expected time.
as time elapses
Focuses on the act of time passing and its consequences.
depending on the timing
Highlights that the outcome is conditional to when something happens.
at a later date
Refers to a point in the future.
in the fullness of time
Implies that something will occur when the circumstances are fully developed or ripe.
eventually
Indicates that something will happen at some unspecified future time.
FAQs
How can I use "by time" in a sentence?
Use "by time" to show how something changes or is affected as time passes. For example, "Her skills improved "by time" and practice" shows how time influenced her skill development.
What does "by time" mean?
"By time" signifies a relationship or dependency on a specific moment or the passage of time. It indicates that something is measured, influenced, or determined in relation to time. It doesn't mean "eventually" or "before a deadline".
Is there a difference between "by time" and "with time"?
While both phrases relate to the concept of time, "with time" implies a gradual process or development, whereas "by time" suggests measurement or influence at a specific point or duration. You can use "with time" when emphasizing the gradual change.
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
79%
Authority and reliability
4.1/5
Expert rating
Real-world application tested