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what minute; how many minutes
「何分」 has another reading with different meanings.
この料理を作るのに何分くらいかかりますか。
About how many minutes does it take to make this dish?
時刻表を確認したら次の電車は何分後に来ますか。
How many minutes until the next train comes?
今、何分か余裕があるので休憩しよう。
I have a few minutes now so let's take a break.