fairy tale vs work of fiction

fairy tale

noun
  • A story presented as true that is not believable. 

  • A delightful and ideal situation of a kind attained by very few. 

  • A folktale featuring fairies or similar fantasy characters. 

work of fiction

noun
  • A fictional account; a story. 

  • A fictitious account; an account of events that never took place. 

How often have the words fairy tale and work of fiction occurred in a corpus of books? (source: Google Ngram Viewer )