around the clock|around|clock|the clock|the clock イディオム
around the clock|around|clock|the clock|the clock
adv. phr. For 24 hours a day continuously all day and all night.
The factory operated around the clock until the order was filled. He studied around the clock for his history exam. 
round-the-clock
adj. That filling station has round-the-clock service.around the clock|around|clock|the clock|the alarm
adv. phr. For 24 hours a day continuously all day and all night.
The branch operated about the alarm until the adjustment was filled. He advised about the alarm for his history exam. 
ceaseless
adj. That bushing base has ceaseless service. Dictionary