by two years

USAGE SUMMARY

The phrase "by two years" is correct and usable in written English.
It can be used to indicate a difference in age, time, or duration, often in comparisons or measurements. Example: "She is older than her brother by two years."

✓ Grammatically correct

News & Media

Encyclopedias

Science

Human-verified examples from authoritative sources

Exact Expressions

57 human-written examples

She beat Lillian Lifflander by two years.

The New York Times

I came up short by two years.

The New York Times

It may be extended twice, each time by two years.

The Guardian

Two years went by, two years of drought.

The Guardian - Books

IT project Aurora was also delayed by two years.

The Guardian - TV & Radio

He failed to get the party to extend his presidential term by two years.

The Economist

The program to replace the Ohio class nuclear-missile submarine will be delayed by two years.

The New York Times

But by two years, the majority of Americans were saying, "O.K., then it's his".

The New Yorker

She was older than I was by two years and knew so much more.

The New Yorker

His college years were interrupted by two years in the Navy, 1944-46.

The New York Times

By two years of age a child's comprehension vocabulary contains an average of about 270 words.

Encyclopedia Britannica

Expert writing Tips

Best practice

When comparing ages, use "by two years" to clearly state the age difference, such as "She is older than her brother by two years".

Common error

Avoid using "by two years" when "for two years" is more appropriate. "By two years" indicates a difference, while "for two years" indicates a duration. For instance, say "The project lasted for two years", not "by two years".

Linguistic Context

The phrase "by two years" functions as an adverbial modifier, indicating the extent of a difference or duration. As shown by Ludwig, it is commonly used to specify age differences or the length of delays.

Expression frequency: Very common

Frequent in

News & Media

60%

Encyclopedias

20%

Science

10%

Less common in

Wiki

5%

Formal & Business

3%

Reference

2%

Ludwig's WRAP-UP

The phrase "by two years" is a common and grammatically correct way to express a difference in time or age. As Ludwig AI indicates, it is frequently used across various contexts, including news, encyclopedias, and scientific publications. Its neutral register makes it suitable for both formal and informal communication. To ensure clarity, use "by two years" when indicating a difference and "for two years" when indicating duration. The numerous examples found by Ludwig demonstrate its versatility and widespread acceptance.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

a two-year difference

Highlights the specific quantitative contrast in duration or age.

for a duration of two years

Formal way to specify the length of something, stressing the exact period.

lasting for two years

Focuses on the continuation or persistence of something over a defined period.

separated by two years

Emphasizes the gap between two events or occurrences.

over a two-year period

Emphasizes the duration of an event or study, highlighting the time frame involved.

spanning two years

Highlights the extent or reach of an event across a two-year interval.

two years ahead

Indicates being further along in time or progress, emphasizing advancement.

two years behind

Indicates lagging in time or progress, highlighting a delay.

in a couple of years

Refers to a timeframe approximately equal to two years, often used for future events.

within the space of two years

Indicates something occurring within a specific time frame, setting a limit.

FAQs

How can I use "by two years" in a sentence?

Use "by two years" to show a difference in age or time. For example, "She is older than him by two years", or "The project was delayed "by two years"".

What's a more formal alternative to "by two years"?

A more formal alternative is "for a duration of two years", which emphasizes the length of time in a professional setting.

What's the difference between "by two years" and "for two years"?

"By two years" indicates a difference or margin (e.g., older by two years), while "for two years" indicates a duration of time (e.g., worked for two years).

Is it correct to say "He is younger by two years" or should I use another phrasing?

"He is younger by two years" is grammatically correct. You could also say "There is a two-year age difference" or "He is two years younger" for similar meanings.