I must have spent dozens of hours taking care of him.

Not after already spending dozens of hours in the lab.

You could spend dozens of hours (as I have) and they'd think you never play at all.

By the time he writes a college recommendation, he's spent dozens of hours with the student.

It is possible to spend dozens of hours exploring Skyrim and making your character more powerful before you even touch the main story line.

The head coach spends dozens of hours during the week planning.

But to prepare, he said, both men have spent dozens of hours riding the system and mapping out transfer points in stations.

It's also, refreshingly, an open world game that you don't need to spend dozens of hours on.

We've spent dozens of nights under the same roof in the past!

Moreover, senior lawyers at many firms are spending dozens of hours a week seeking to avert problems.