Work periods Crossword Clue

 The answer to the crossword clue "Work periods" could be SHIFTS.

A shift is a period of time during which someone works. Shifts can vary in length, but they are typically 8 hours long.

Here are some other words that can be used in a crossword puzzle clue for "Work periods":

Terms

Tours

Stints

Assignments

Tenures

Durations

Timeframes

Periods

Spans

Intervals

The specific word that is used will depend on the context of the puzzle and the author's preference.