The balloon was expected to operate for ten days.

It was designed to operate for between 15 and 30 days.

It has been reported that this mill operated 22 out of 24 hours a day for six days a week.

You operated for five days in a state of exhaustion, with little or no sleep.

It had originally only been expected to operate for 720 days.

The reactor operates for 43 days and remains in high earth orbit.

Before the recent problems, the plant operated for 382 consecutive days after last summer's blackout.

The smoke shop had been operating for two days when it was raided.

Hospitals were required to have enough emergency provisions to operate for two to three days during a disaster.

It operates from the basement of the county jail for five days a week, four hours each day.