magus vs sorceress

magus

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

  • A Zoroastrian priest. 

sorceress

noun
  • A female sorcerer, especially one who is elegant; compare witch. 

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