'work round the clock' is correct and usable in written English.
You can use it to describe a situation in which someone is working long hours, usually without taking a break. For example, "We have to finish the project this week, so everyone needs to work round the clock to get it done on time."
Like the firms' own monitors, they work round the clock.
Workers are trying to remove bodies before they reach the lake, and crews work round the clock, Pinto said.
He wants courts to work round the clock to deal with hooligans, and to raise productivity by computerising paperwork.
The cables indicate that Slovak diplomacy had to work round the clock to smooth things over with the Americans as a result.
The schools will now have to work round the clock to try to create costumes and floats that they normally spend a year making.
I'm a workaholic and would work round the clock if I could, so this made a huge impression for the better".
Anonymous censors, whose job is given the polite Persian word momayezi (evaluating), work round-the-clock to examine texts for anything that could be considered obscene, inappropriate or politically unacceptable.
You are expected to work round-the-clock, evenings and weekends, and, although firms are now being forced to be more supportive of new recruits, if you get put in with an arrogant, difficult boss, your life can be made a misery.
The last of the stranded vehicles were finally removed from three major routes, Interstates 78, 80 and 81, early Friday morning, and the state's transportation secretary, Allen D. Biehler, said crews would work round-the-clock to clear the highways of up to six inches of ice.
The billionaire founder of Viacom has a team of nurses who work round-the-clock to attend to his needs, but Cowan questioned the setup.
The firm's spokeswoman Sarah Boundy said staff had worked round the clock to run the best service it could given the "very problematic" weather.
