This is the 6552nd most frequent Catalan word.
quants
"Quants" means "how many" in English.
"Quants" is used as an interrogative pronoun asking about a quantity (number of years) in a question.
Quants anys tens?
How old are you?
"Quants" is used as a relative pronoun introducing a subordinate clause about an unknown quantity (number of books).
No sé quants llibres hi ha.
I don’t know how many books there are.
"Quants" is used to inquire about a specific number (of days) in a situation requiring planning or evaluation.