There's a degree or two of frost and the air is clear.

Don't do this until all threat of frost has gone!

It was going to be a night of frost and silver.

But I noticed at once a touch of frost upon the air.

In fact, there was a layer of frost all about.

She let it out again in a cloud of frost.

The city averages only four days of frost a year.

That particular day was cold, with a hint of coming frost.

The night air was cold with the first sting of frost.

It was a beautiful day, with only a light trace of frost.