on the clock
01
勤務時間中, 仕事中
during the hours that one is required to be working
idiom
例
He's getting paid overtime for working on the weekend, but only for the hours he's on the clock.
勤務時間中に私用電話をするべきではない。
number on the clock
01
used to indicate how much distance vehicle has undertaken, often in miles
idiom
例
This used car has 100,000 miles on the clock, but it's still in excellent condition.
