hatchback vs two-seater

hatchback

noun
  • A car with a sloping, hinged rear door that opens upwards. 

  • The door itself. 

two-seater

noun
  • A vehicle with seats for two people (a driver or pilot and one passenger) 

How often have the words hatchback and two-seater occurred in a corpus of books? (source: Google Ngram Viewer )