fairground vs holiday park

fairground

noun
  • A commercially-operated collection of rides, games and other entertainment attractions; an amusement park. 

  • An area where a fair (an event for public entertainment) or other public event is held; a showground. 

holiday park

noun
  • An amusement park. 

  • A commercial facility that includes various forms of inexpensive accommodation, such as campsites, cabins, caravan or RV parking, and motel rooms, for the use of people on holiday. 

How often have the words fairground and holiday park occurred in a corpus of books? (source: Google Ngram Viewer )