charmer vs theurge

charmer

noun
  • An enchanter or magician. 

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

theurge

noun
  • One who works miracles, or persuades a god or spirit to perform a supernatural work. 

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