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 quote

Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

MitStanfordHarvardAustralian Nationa UniversityNanyangOxford

a longtime

Grammar usage guide and real-world examples

USAGE SUMMARY

The phrase "a longtime" is not correct in standard written English.
The correct form is "a long time," which is used to refer to an extended duration. Example: "I haven't seen you in a long time; how have you been?"

⚠ May contain grammatical issues

News & Media

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

Vernon was a longtime admirer.

Was that a longtime goal?

News & Media

The New York Times

Drake's been a longtime admirer.

News & Media

The New York Times

Dinkins, and a longtime nonprofit executive.

News & Media

The New York Times

He was a longtime Fullerton resident.

He was later a longtime scout.

"It is a longtime goal of mine.

News & Media

The New York Times

Barzani, a longtime guerrilla fighter, was alarmed.

News & Media

The New Yorker

— Gardner Dickinson, a longtime American tour pro.

News & Media

The New York Times

Ann Lewis, a longtime adviser, echoed that.

News & Media

The New York Times

Cummings is a longtime Vicco surname.

News & Media

The New York Times
Show more...

Expert writing Tips

Best practice

Use "a long time" instead of "a longtime" to adhere to standard English grammar. While the single-word form is frequently encountered, it's considered grammatically incorrect.

Common error

Resist the urge to combine "a long time" into "a longtime". Always maintain the separation to ensure grammatical correctness. This is especially important in formal writing.

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

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

84%

Authority and reliability

3.5/5

Expert rating

Real-world application tested

Linguistic Context

The phrase is intended to function as an adjective, modifying a noun to indicate duration or prolonged association. However, as Ludwig AI notes, the one-word form is grammatically incorrect.

Expression frequency: Very common

Frequent in

News & Media

100%

Less common in

Science

0%

Formal & Business

0%

Wiki

0%

Ludwig's WRAP-UP

While the phrase "a longtime" is frequently encountered, Ludwig AI indicates that it's grammatically incorrect. The correct form is "a long time", and alternatives like "a long-standing" or "an enduring" may also be suitable depending on the specific context. Despite its prevalence, especially in news and media, prioritizing grammatical accuracy by using the two-word form or a synonym is always recommended.

FAQs

Which is correct, "a longtime" or "a long time"?

The grammatically correct form is "a long time", which uses two words. Although commonly used, "a longtime" is considered incorrect in standard written English.

What does "a longtime" mean?

While grammatically incorrect, "a longtime" is generally understood to mean "for a long period of time" or "having been associated with something for a considerable duration". It's best to use the correct phrase, "a long time", instead.

Can I use "a longtime" in informal writing?

While its usage is widespread and may be acceptable in very informal contexts, it is recommended to avoid "a longtime" even in informal writing. Opt for "a long time" or other alternatives for clarity and correctness.

What are some alternatives to using "a longtime"?

Instead of "a longtime", consider using phrases like "a long-standing", "an enduring", or simply "a long time" depending on the intended meaning and context. These provide grammatically sound options for expressing duration.

ChatGPT power + Grammarly precisionChatGPT power + Grammarly precision
ChatGPT + Grammarly

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.

Source & Trust

84%

Authority and reliability

3.5/5

Expert rating

Real-world application tested

Most frequent sentences: