duty hours
nounUK /ˈdjuːti ˈaʊəz/
US /ˈduːti ˈaʊərz/
The times when you must be at work or on duty.
The nurse's duty hours are from eight in the morning until four in the afternoon.
OTHER MEANINGS
2. The officially set period during which a doctor or other worker must be available for work.
New rules limit residents' duty hours to eighty a week.
3. The hours a ship or machine is actively in service.
The ferry's duty hours change with the season.
4. Time spent performing required tasks rather than resting.
He counted his duty hours carefully for the pay slip.