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• shift work

From shift +‎ work.

shiftwork (uncountable)

1. Scheduled work outside of customary daylight working hours.
2. A mode of employment in which sets of workers are rotated to maintain a continuous 24/7 operation; usually, with a system of three 8-hour shifts (24 ÷ 3 = 8): first shift, second shift, and third shift.

• work shift