cunning folk vs illusionist

cunning folk

noun
  • professional or semi-professional practitioners of magic (who were often charlatans) who were active from at least the 15th up until the early 20th century. 

illusionist

noun
  • One who deceives by magical or mystical means. 

  • One who works with illusion or sleight of hand. 

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