pishogue vs theurge

pishogue

noun
  • Magic, witchcraft; a spell, especially one designed to cause or cure illnesses to man or beast, or to increase or decrease the quantities of farm products such as butter or milk. 

theurge

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

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