cunning folk vs magus

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. 

magus

noun
  • A magician; (derogatory) a conjurer or sorcerer, especially one who is a charlatan or trickster. 

  • A Zoroastrian priest. 

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