Cunetto has spent countless hours doing R&D to find the right techniques.

He prepared for the interview by spending countless hours at the library.

My countless hours upon the sea have mostly been happy ones.

Advisers to the two companies spent countless hours discussing options for a deal.

I have lain in that way, Mr. Brett, for countless hours.

And just like its cinematic predecessor, this projector provides countless hours of entertainment.

Maddie had spent countless hours staring at the photograph from the private investigator.

He spent countless hours playing this Dungeons-and-Dragons-like computer creation, but playing wasn't enough.

Sick of wasting countless hours sitting through the latest Hollywood blockbusters?

They must work countless hours while others who are less driven rest or sleep.

He said groups like the trust put in countless hours to preserve the birds.

She'd stay all day, for countless hours while he worked.

I'd spent countless hours with him there over the years.

In the countless hours of darkening thoughts, Kathy imagined again where she would live.

Most have spent countless hours and dollars trying to do something about their weight.

She agreed, and continued to spend those countless hours studying.