Example: A lunch room in an office setting has limited hours of operation.

"However, no decisions have yet been taken about the Tube's hours of operation during 2012."

The model has logged over 16.5 million hours of operation.

In practice, users got slightly more than an hour of operation.

The Senate dining room will cut back its hours of operation to save money.

"Their hours of operation are different from our typical 9-to-5 day."

The oil should be changed after every 25 hours of operation.

The hours of operation started at nine o'clock, and they weren't talking about the morning.

Room service is available but they have hours of operation.

The basic hours of operation are from early morning to evening.