crack up vs have a laugh

crack up

verb

To laugh heartily.
To cause to laugh heartily.
To become insane; to suffer a mental breakdown.
To crash an aircraft or automobile.
To cry up; to extol.

adj

Funny; hilarious

have a laugh

verb

To laugh.
To joke; kid around.
To enjoy oneself; have fun.

How often have the words crack up and have a laugh occurred in a corpus of books? (source: Google Ngram Viewer )