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Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

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proficiency in

Grammar usage guide and real-world examples

USAGE SUMMARY

"proficiency in" is correct and usable in written English.
You can use it to describe someone's ability in a certain activity or skill. Example: She demonstrated a high level of proficiency in Spanish.

✓ Grammatically correct

Academia

News & Media

Science

Formal & Business

Wiki

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

Many jobs require proficiency in Irish.

News & Media

The Economist

Determine your level of proficiency in English.

News & Media

The New York Times

Proficiency in calculus essential.

Prerequisites: reading proficiency in Polish.

Prerequisite: proficiency in multivariate calculus.

Prerequisites: Proficiency in Arabic required.

Proficiency in arranging Illusory Public Offerings (I.P.O.'s) required.

News & Media

The New York Times

An extra section, which is optional, tests proficiency in Spanish.

News & Media

The New York Times

The company's proficiency in software and data crunching is unquestioned.

(c) Correlation between GMV decrease and unicyling proficiency in rSTG.

Science & Research

Nature

Proficiency in interpersonal, interpretive, and presentational communication.

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Expert writing Tips

Best practice

When describing abilities, use "proficiency in" to highlight a developed skill or competence in a specific area. For example, "She has a high level of proficiency in data analysis."

Common error

Avoid using "proficiency at" as it is less common and grammatically awkward. "Proficiency in" is the standard and preferred construction.

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

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

86%

Authority and reliability

4.5/5

Expert rating

Real-world application tested

Linguistic Context

The phrase "proficiency in" functions as a noun phrase complemented by a preposition, indicating a level of skill or competence. It is commonly used to specify the area in which someone possesses a certain level of ability. Ludwig AI confirms that the phrase is correct and usable.

Expression frequency: Very common

Frequent in

Academia

32%

News & Media

20%

Science

16%

Less common in

Formal & Business

12%

Wiki

4%

Reference

0%

Ludwig's WRAP-UP

In summary, "proficiency in" is a grammatically sound and frequently used phrase for indicating skill or competence in a specific area. Ludwig AI confirms its correctness and usability. It is most common in academic, news, and scientific contexts. While alternatives like "expertise in" and "competence in" exist, "proficiency in" remains a versatile and widely accepted choice. Remember to avoid the less common "proficiency at". Using "proficiency in" effectively communicates the level of skill required or possessed in various domains.

FAQs

How do you use "proficiency in" in a sentence?

Use "proficiency in" to describe someone's skill or competence in a particular area. For example, "The job requires "proficiency in English"".

What's the difference between "proficiency in" and "expertise in"?

"Proficiency in" indicates a general competence or skill, while "expertise in" suggests a higher level of specialized knowledge and experience.

What are some alternatives to "proficiency in"?

You can use alternatives such as "skill in", "competence in", or "mastery of" depending on the specific context.

Is it correct to say "proficiency at" instead of "proficiency in"?

While not strictly incorrect, "proficiency in" is the more widely accepted and grammatically standard form. "Proficiency in" is almost always preferable.

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Authority and reliability

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Real-world application tested

Most frequent sentences: