何~も (many)

She silently endured his abuse for years.

She's worried because she hasn't heard from her son for months.

She watched several plays in succession.

She's been cheating on her husband for years.

She insisted again and again that she was innocent.

She hates leaving anything unfinished.

I spent hours reading books.

I've been looking for our puppy for weeks now.

She called me again and again.

She practiced the piano over and over.

She waited for hours.

She listened to music for hours.

She waited hours for him.

She had to use her dictionary many times.

She'll often just sit there for hours doing nothing.

She often listens to records for hours on end.

Good leather lasts for years.

She had lived there for many years.