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Discover LudwigThe phrase "about 4" is correct and usable in written English.
It can be used when estimating a quantity or time that is approximately four.
Example: "The meeting will start at about 4, so please be on time."
Alternatives: "approximately 4" or "around 4".
Exact(36)
Refrigerate about 4 hours.
It was about 4 a.m.
"Namely me at about 4 o'clock".
Out of about 4 million registered voters.
about 4 snakes on the IRT.
took about 4 weeks!
Similar(24)
Hastings, 33, died about 4 30 a.m.
This makes about 4½ cups frosting.
About 12 hours.
Record about about 4-5 bars.
About 4-7 blockshouldld be enough.
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CEO of Professional Science Editing for Scientists @ prosciediting.com