illusionist vs völva

illusionist

noun
  • One who deceives by magical or mystical means. 

  • One who works with illusion or sleight of hand. 

völva

noun
  • Any prophetess, sooth-sayer, or witch. 

  • In Old Norse society, a female practitioner of magic divination and prophecy. 

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