cunning folk vs virtuoso

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. 

virtuoso

noun
  • Someone with special skill or knowledge; an expert. 

  • An expert in virtù or art objects and antiquities; a connoisseur. 

  • Specifically, a musician (or other performer) with masterly ability, technique, or personal style. 

adj
  • Exhibiting the ability of a virtuoso. 

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