noun
four minutes
Standard counter for minutes; used in time expressions.
ここから駅まで歩いて４分です。
It's a four-minute walk from here to the station.
タイマーを４分にセットしてください。
Please set the timer for four minutes.
Means 'four o'clock', not a duration.
Means 'four hours', a longer duration.
Compound of 四 (four) and 分 (minute), with the reading よん for 四 and ふん for 分, where ふん becomes ぷん due to rendaku.