go-cart vs quad bike

go-cart

noun
  • A small, open-wheeled vehicle for racing; often spelled go-kart. 

quad bike

noun
  • A small off-road four-wheeled powered vehicle, especially of a design derived from a motorcycle, usually used for recreation or farm work. 

How often have the words go-cart and quad bike occurred in a corpus of books? (source: Google Ngram Viewer )