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Justyna Jupowicz-Kozak quote

Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

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per change

Grammar usage guide and real-world examples

USAGE SUMMARY

The phrase "per change" is not correct and is not commonly used in written English.
It is unclear what you intend to convey with "per change," as it does not have a standard meaning or usage in English. Example: "The policy will be updated per change in regulations." (This is incorrect; a better phrase would be used.)

⚠ May contain grammatical issues

Science

News & Media

Human-verified examples from authoritative sources

Exact Expressions

34 human-written examples

This bounty came after most of the industry (minus Southwest) tacitly agreed to create a new industry standard of two hundred dollars per change, plus, in some cases, an additional fifty-dollar service fee for tickets booked on non-airline Web sites.

News & Media

The New Yorker

The batteries, if you can believe it, last 3 years per change.

News & Media

TechCrunch

While not contributing much more fuel economy per change in load fraction than the drive system per change in efficiency, tractive load reduction stands out as the largest untapped source of fuel economy improvement.

The hip RP was defined as the angular position in which the passive joint torque equals zero, and passive hip stiffness was calculated as the change in passive torque per change in joint angle.

Under reasonable assumptions on the motion, we show that the total number of times this BSP changes is O(n2), and that we can update the BSP in O logn) expected time per change.

Abdominal compliance (CAB) was defined as a measure of the ease of abdominal expansion, expressed as a change in intra-abdominal volume (IAV) per change in intra-abdominal pressure (IAP): AC = ΔIAV/ΔIAP [1].

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Human-verified similar examples from authoritative sources

Similar Expressions

26 human-written examples

Below we provide our detailed response to specific comments per changes made in the updated version of the manuscript.

And there might be a two-per-cent change".

News & Media

The New Yorker

Under typical experimental conditions, beat rate varied approximately 10% per degree change in temperature or per 0.1 unit change in pH.

Steve Politi of The Star-Ledger wonders if Girardi gets paid per pitching change.

News & Media

The New York Times

Argon leakage may fractionate the remaining 40Ar/36Ar ratio by +0.007‰ perchange in 84Kr/36Ar, introducing a possible bias in reconstructed firn thickness of about +2 m if thermal diffusion is not accounted for or +6 m if thermal diffusion effects are quantified with measured 15N/14N.

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Expert writing Tips

Best practice

When describing rates or proportions, replace "per change" with more precise language such as "for each change", "with every change", or "per unit change" to ensure clarity.

Common error

Avoid using "per change" in formal writing assuming it's a universally accepted phrase. While it appears in some contexts (particularly scientific), it's often better replaced with clearer alternatives like "for each change" or "with every change" to prevent confusion.

Antonio Rotolo, PhD - Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

82%

Authority and reliability

2.8/5

Expert rating

Real-world application tested

Linguistic Context

The phrase "per change" functions primarily as a prepositional phrase attempting to express a ratio or rate of change. As Ludwig indicates, this construction is not considered standard English, suggesting alternative phrasing for clarity.

Expression frequency: Uncommon

Frequent in

Science

73%

News & Media

24%

Wiki

3%

Less common in

Formal & Business

0%

Encyclopedias

0%

Reference

0%

Ludwig's WRAP-UP

In summary, while the phrase "per change" appears in some contexts, particularly scientific ones, it is not considered standard English. Ludwig underscores that it is incorrect and should be replaced with clearer alternatives. Common replacements include "for each change", "with every change", or "per unit change", depending on the specific meaning you intend to convey. Predominantly found in scientific and news-related articles, its use in formal writing should be approached with caution. To ensure clear and grammatically correct communication, using alternative phrases is highly recommended.

FAQs

What does "per change" mean in a scientific context?

In scientific contexts, "per change" often refers to the amount of variation in one variable relative to a change in another, typically expressed as a ratio. For clearer communication, consider using phrases like "change in Y per change in X" or "Y varies with X".

What can I say instead of "per change"?

Depending on the context, you can use alternatives like "for each change", "with every change", or "per unit change" for clearer and more standard English.

Is "per change" grammatically correct in formal writing?

While "per change" appears in some technical contexts, it is not considered standard English for general use. Using alternatives like "for each change" is recommended for formal writing.

How does "per change" compare to "for each change"?

"For each change" is generally preferred over "per change" because it's more explicit and universally understood. While "per change" may be acceptable in specific technical domains, "for each change" provides greater clarity in most situations.

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Source & Trust

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Authority and reliability

2.8/5

Expert rating

Real-world application tested

Most frequent sentences: