charmer vs witch doctor

charmer

noun
  • An enchanter or magician. 

  • A charming person; one who charms or seduces; a smoothie. 

witch doctor

noun
  • A person (often male) who is believed to ward off witchcraft and heal through magical powers; a shaman. 

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