This is a service business, where you have to put in long hours at times.

We put in at midnight, by the dark of the new moon.

You work hard and put in long hours at the office.

And it is too heavy to put in much at a time.

Have you put in additional hours at work over the last few days?

Do you know how much we put in at night to phone Billy?

The parents also are required to put in service hours at the school.

The east window was probably put in at this time.

To do this, another engine was put in at the back.

Extensive work has been put in at all levels and across a wide range of areas.