folktale vs parable

folktale

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

parable

noun
  • A short narrative illustrating a lesson (usually religious/moral) by comparison or analogy. 

verb
  • To represent by parable. 

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