"works round the clock" is a correct and commonly used phrase in written English.
It means to work all day and all night without taking a break. You can use this phrase to talk about someone who works extremely hard and doesn't take breaks or rest. Here is an example: "The dedicated team at the hospital works round the clock to save lives and provide care for their patients."
Now, he jokes, he gets up at six and,works five days a week although I suspect Adams works round the clock.
Ejiofor plays Okwe, a Nigerian doctor with a terrible secret who fled to London, works round the clock as a minicab driver and receptionist in a seedy hotel, and one night makes an appalling discovery.
He works round the clock, often gets by on four hours of sleep, has three sons, yet still finds time to volunteer, operating on AIDS patients in Africa and checking on monkeys' hearts at the National Zoo.
It works round the clock and only stops for maintenance.
He said he wanted success on 7 May "for the small business that works round the clock to build something, employ people and make a success... for those who go out and work hard to get that security for their family, to make the most of their lives".
The bakery worked round-the-clock, but there still long queues for bread.
It takes an ad hoc "war room" at Facebook headquarters with dozens of staff members working round-the-clock shifts.
The employees of Northeast Frontier Railways "worked round-the-clock the past two weeks to clear the debris and restored over 150 meters of rail tracks.
He said he had been working round-the-clock in a rented studio north of Rome to create the paintings that will be shown in Venice.
For the large team, working round-the-clock in their San Francisco office, Mrs. Olson provided a down-home dose of Southern hospitality.
The Kremlin apparently spent about a million dollars a month to fund Internet trolls working round-the-clock shifts in a run-down office building in St . Petersburg
