It's been fewer than 10 days since the accident.
Question: Is fewer than 10 a quantifier?
Yes. Anything that signifies a number or amount is a quantifier when it stands before a noun. CJ
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Yes. Anything that signifies a number or amount is a quantifier when it stands before a noun.
CJ
"Fewer" is not usual there. Time spans get "less":
It has been less than a week.
It was less than three days ago.
It's logical, too, when you think about it. You are not really talking about a number but a duration.