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 time
Grammar usage guide and real-world examplesUSAGE SUMMARY
"one time" is correct and usable in written English.
You can use it when referring to a single occurrence of something. For example: "I went to the store one time and they didn't have the product in stock.
✓ Grammatically correct
Wiki
News & Media
Academia
Science
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
48 human-written examples
Click on "One Time Payment.
Wiki
One time, that's on me.
News & Media
"One time is sufficient".
News & Media
"One time," she said.
News & Media
One time, it was milkweed.
News & Media
"One time is too many.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
12 human-written examples
(Another "one-time sale").
News & Media
It's a one-time sell".
News & Media
One-time passwords.
Academia
Both winners are one-time California castoffs.
News & Media
It's usually a one-time thing.
News & Media
Expert writing Tips
Best practice
Use "one time" to clearly indicate a single occurrence, especially when contrasting it with multiple or repeated instances.
Common error
Avoid using "one time" when you mean "at one time", which indicates a past period or era, not a single instance. For example, say "At one time, this city was a small village", not "One time, this city was a small village".
Source & Trust
80%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "one time" functions primarily as an adverbial phrase, modifying a verb to indicate the frequency or occurrence of an action. As Ludwig AI explains, it specifies that something happened only on a single occasion. This usage is supported by the examples provided.
Frequent in
News & Media
45%
Wiki
28%
Academia
10%
Less common in
Science
10%
Formal & Business
5%
Reference
2%
Ludwig's WRAP-UP
In summary, "one time" is a grammatically sound and frequently employed phrase that functions as an adverbial, indicating a single occurrence. Ludwig AI confirms its correct usage for specifying the frequency of an event. It maintains a neutral register, fitting seamlessly into diverse contexts ranging from news and media to academic discussions. While versatile, it's crucial to distinguish its meaning from "at one time", ensuring clarity in your writing. With numerous examples available, understanding and applying "one time" effectively is readily achievable.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
once
A simpler, single-word synonym for "one time".
on one occasion
More formal and emphasizes a specific instance.
a single time
Emphasizes the singularity of the event.
just once
Adds emphasis to the fact that it only happened a single time.
a solitary instance
More formal and highlights the isolated nature of the occurrence.
a unique occasion
Highlights the distinctiveness of the event.
in one instance
Focuses on a particular example.
for a single moment
Emphasizes the brevity of the occurrence.
at one point
Indicates a specific moment in time when something happened.
in a past instance
Focuses on something that happened in a past event.
FAQs
How can I use "one time" in a sentence?
Use "one time" to describe a single instance of an event or action. For example, "I saw him "one time" at the store".
What is a synonym for "one time"?
Alternatives to "one time" include "once", "on one occasion", or "a single time".
Is it correct to say "one time" or "one time only"?
Both phrases are correct, but "one time only" emphasizes that something happens or is valid only a single time.
What's the difference between "one time" and "at one time"?
"One time" refers to a single instance, while "at one time" refers to a period in the past. For example, "At one time, I lived in New York" means you lived there in the past.
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
80%
Authority and reliability
4.5/5
Expert rating
Real-world application tested