gythja vs priestess

gythja

noun
  • A priestess of the modern Norse religion. 

priestess

noun
  • A woman with religious duties and responsibilities in certain non-Christian religions. 

  • A female Christian priest or minister, typically in a Protestant, Old Catholic, or independent Catholic denomination. 

verb
  • To oversee (a pagan ceremony, etc.) as priestess. 

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