A team of 12 artists spent six weeks working on the film.

I'm sure that the design team over there spent weeks working on this.

About 3 out of 10 physicians worked more than 60 hours a week in 2008.

He spent two weeks working 18-hour days to bring up the skull.

With almost a week to work in we'll be able to pull this off, but only if we get going immediately.

He spent weeks working on the 450-pound chunk of rock.

I think three weeks has worked quite well, we've had no troubles with it.

His secretary called and said that early next week doesn't work for him.

The students were required to use laptops, and they each spent about 17 hours per week working on them.

Three weeks from now, neither of those kids will still be working there.