Every time; on each occasion—indicates that something happens on each occurrence or instance.
試合の前は毎回緊張してしまう。
I get nervous before every match.
毎回会議の時間を守ってください。
Please be on time for the meeting every time.
彼は毎回宿題を忘れて先生に注意される。
He forgets his homework every time and gets scolded by the teacher.