noun
number of working days; days worked
Used in employment, payroll, and attendance contexts to refer to the count of days an employee actually worked.
今月の就業日数は20日です。
The number of working days this month is 20.
就業日数に応じて給与が計算されます。
Salary is calculated based on the number of days worked.
Compound of 就業 (employment, work) and 日数 (number of days).