Two and a quarter hours!

Pressure released every quarter hour.

I want updates every quarter hour.

Over one quarter hour follow you.

- An hour? - You want quarter hours? Go someplace else.

Twenty-eight and three-quarter hours' worth of straight driving.

Three quarters of an hour.

A quarter of an hour?

Three quarters of an hour.

The mission lasted four and a quarter hours after which the group returned to Rashid airfield.