million years

USAGE SUMMARY

"million years" is correct and usable in written English.
You can use the phrase to express a large amount of time, as in, "The Earth has been around for several million years."

✓ Grammatically correct

Science

News & Media

Encyclopedias

Human-verified examples from authoritative sources

Exact Expressions

59 human-written examples

(A million years pass).

The New Yorker

Ninety million years, 155 million years, Cretaceous, Jurassic.

Independent

"Not in a million years".

The New York Times

His species survived for 50 million years.

Independent

That was a million years ago.

The New Yorker

These caves are a million years old.

The New York Times

Its estimated age is 66 million years.

Encyclopedia Britannica

zaughty?????? NEVER IN THE MILLION YEARS!!! @NaughtyBoyMusic !!!!!!!!!!

Independent

The computer labors for 7.5 million years.

The New York Times

Lived 25 million years ago in Asia.

The New Yorker

Human-verified similar examples from authoritative sources

Similar Expressions

1 human-written examples

A hundred million years.

The New York Times

Expert writing Tips

Best practice

When discussing scientific topics, use "million years" to provide context to events like evolution, geological changes, or astronomical phenomena. Ensure accuracy by checking data and citing reliable sources.

Common error

Avoid using "million years" when specific dates are required. For example, instead of saying "The event happened a million years ago, approximately", provide the most accurate estimate available, even if it's an approximation. Refrain from using it when greater specificity is possible.

Linguistic Context

The phrase "million years" functions primarily as a noun phrase, often used as an adverbial modifier to specify the duration or timeframe of an event or process. Ludwig AI confirms this is correct and usable in written English.

Expression frequency: Very common

Frequent in

Science

34%

News & Media

59%

Encyclopedias

3%

Less common in

Wiki

2%

Academia

2%

Formal & Business

0%

Ludwig's WRAP-UP

In summary, the phrase "million years" is a grammatically sound and frequently used noun phrase that denotes immense periods, primarily in scientific, news, and encyclopedia contexts. Ludwig AI analysis affirms its correctness and usability. When writing, ensure that you are using it accurately to provide context for events spanning long timescales, avoiding its use when specific dates are needed. While generally neutral, its register leans towards formal and scientific, aligning with its prevalence in factual reporting and academic research.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

millions of years ago

This alternative adds a temporal reference point, indicating a past occurrence.

a vast expanse of time

This phrase emphasizes the immensity of the time period.

deep time

A geological term referring to the immense timescale of Earth's history.

geological timescales

Specifically refers to the timeline used in geology to describe the history and age of the Earth.

over eons

Uses 'eons' as a synonym for extremely long periods.

extended period

A broader term that can encompass various lengths of time, but suggests a considerable duration.

a long duration

Similar to 'extended period', but slightly less formal.

innumerable years

Highlights the countless nature of the years in question.

across centuries

Refers to a period spanning multiple centuries, emphasizing a historical perspective.

through ages

Implies a progression across different historical or evolutionary stages.

FAQs

How can I use "million years" in a sentence?

You can use "million years" to refer to extremely long periods, as in, "Dinosaurs roamed the Earth for millions of years before becoming extinct."

What's the difference between "million years ago" and "millions of years ago"?

Both phrases are generally interchangeable. "Million years ago" emphasizes a specific period, while "millions of years ago" suggests a range or approximate timeframe.

Are there alternatives to "million years" that I can use to describe a long time?

Yes, you can use alternatives such as "vast expanse of time", "deep time", or "geological timescales" depending on the context.

In scientific writing, is "million years" considered a formal or informal term?

"Million years" is considered a standard and acceptable term in scientific writing for describing geological or evolutionary timescales. It is neither overly formal nor informal.