fiction vs folktale

fiction

noun
  • A verbal or written account that is not based on actual events (often intended to mislead). 

  • Literary type using invented or imaginative writing, instead of real facts, usually written as prose. 

  • A legal fiction. 

folktale

noun
  • A tale or story that is part of the oral tradition of a people or a place. 

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