noun
number of days attended; attendance days
Used in educational or institutional contexts to count the days a person has been present.
出席日数が足りないと、単位がもらえません。
If you don't have enough attendance days, you won't get credit.
今学期の出席日数を確認してください。
Please check the number of days you've attended this semester.
Compound of 出席 (attendance) and 日数 (number of days).