He works hard night in, night out.

We had many one-dog nights during our camping trip.

The nights of long knives were filled with fear and uncertainty.

The Nights of the Long Knives were a series of political purges carried out by the Nazi regime in Germany.

The Nights of Long Knives were a series of brutal political purges.

The nights of the long knives were a period of political purges in Germany.

I had several good nights' sleeps last week.

We had three dog nights during our camping trip.

We had three-dog nights during our camping trip.

He may act innocent, but he wasn't born at night but not last night.