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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
up to once
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "up to once" is not standard in written English and may cause confusion.
It could be used in contexts where you want to indicate a maximum frequency of occurrence, but it is better to clarify the intended meaning. Example: "You can visit the museum up to once a month."
News & Media
Science
Wiki
Alternative expressions(7)
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
37 human-written examples
And I want a political system that people can trust and look up to once again.
News & Media
Individual respondents may be contacted up to once every two weeks.
News & Media
By Hendrik Hertzberg Forty years ago, people used to wonder what John F. Kennedy was going to get up to once he wasn't President anymore.
News & Media
I want us to build an economy that rewards work, I want us to build a society with stronger families and stronger communities and I want a political system that people can trust and look up to once again.
News & Media
The pill costs £3, can be taken up to once a day, and is designed to be used whenever the patient wants to stave off the desire to drink.
News & Media
The sculptor Francis Chantrey, determined to see what he was up to, once imitated the footstep so successfully that he slipped into the library before Turner could slam the door shut again.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
22 human-written examples
These were the Guy and Girl who spoke so winningly in accepting their Academy Award — they wrote the songs for the movie that form the score for the musical — and they were the Guy and Girl whose breakup was painfully rendered in a follow-up to "Once," the 2011 documentary "The Swell Season".
News & Media
Let's start in time-honoured fashion with the Traverse, where the lineup includes a new Enda Walsh play, Penelope, brought over by Druid; a provocative piece called While You Lie, by Sam Holcroft, who made an impressive debut with the National Theatre of Scotland's Cockroach in 2008; and Ontroerend Goed's follow-up to Once and for All..., a darker vision of adolescent life called Teenage Riot.
News & Media
You remind me of you.We had been up to Speculator once before.
News & Media
It is gearing up to climb once more.(Photo credit: AFP).
News & Media
It is up to Americans once again to insist that this spirit deserves support, not disparagement.
News & Media
Expert writing Tips
Best practice
When using "up to once", ensure clarity by specifying the timeframe. For example, "You can apply this cream up to once a day" clarifies the frequency within a daily period.
Common error
Avoid using "up to once" without a clear timeframe. Saying "You can use this" is ambiguous; instead, specify "You can use this up to once a week" for better clarity.
Source & Trust
84%
Authority and reliability
3.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "up to once" functions as an adverbial phrase modifying a verb. It specifies the maximum frequency of an action or event, indicating that it can occur zero or one time. Although not incorrect, Ludwig AI identifies it as somewhat unusual and suggests clearer alternatives.
Frequent in
News & Media
40%
Science
40%
Wiki
20%
Less common in
Formal & Business
0%
Academia
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "up to once" is a phrase used to specify a maximum frequency of one occurrence, although it is identified by Ludwig AI as somewhat unusual. While grammatically acceptable, alternatives like "at most once" or "no more than once" may provide greater clarity. It's crucial to specify a timeframe when using this phrase to avoid ambiguity. The phrase appears mostly in "News & Media" and "Science" contexts, and is deemed to have a neutral register. Although it has the merit of being concise, it is better to use alternatives.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
at most once
Emphasizes the maximum limit of one occurrence.
no more than once
Clearly states the upper limit as a single instance.
maximum of once
Highlights the single occurrence as the highest possible frequency.
up to a single time
Replaces "once" with "a single time" for emphasis.
not exceeding once
Formal alternative specifying that frequency should not go beyond one instance.
up to one occasion
Substitutes "once" with "one occasion", focusing on event-based occurrence.
at the most one time
Rephrases "once" to emphasize the upper bound for the number of times something can happen.
not more than a single instance
A more verbose way to say "no more than once".
up to a first occurrence
Focuses on the initial instance and does not emphasize the frequency.
no more than on one occasion
Expresses the idea that something will occur on no more than one specific instance.
FAQs
How can I rephrase "up to once" for better clarity?
For clearer communication, use phrases like "at most once", "no more than once", or "a maximum of once" to specify a maximum frequency without ambiguity.
Is it grammatically correct to say "up to once"?
While not incorrect, "up to once" is less common. It indicates a maximum frequency of one. Consider clearer alternatives like "at most once" for better understanding.
What does "up to once a week" mean?
"Up to once a week" means something can happen zero or one time within a week. To avoid vagueness, ensure you specify whether it's expected to happen at all, such as "It will occur once a week, if needed".
How does "up to once" compare to "at least once"?
"Up to once" sets a maximum frequency of one, meaning zero or one occurrence is permissible. "At least once", however, specifies a minimum frequency of one, implying it must happen one or more times.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
84%
Authority and reliability
3.8/5
Expert rating
Real-world application tested