guru vs high priestess

guru

noun
  • A Hindu or Sikh spiritual teacher. 

  • In Indian traditions,it means a knowlegable teacher who guides his shishya(disciple/lit. seeker of [of knowledge or truth]) 

  • An influential advisor or mentor. 

verb
  • To act as a guru; to give wise advice 

high priestess

noun
  • A female clergyman with a higher function than a normal priestess. 

  • A third degree (sometimes forth degree) female witch in Wicca. 

  • the second trump or major arcana card in most traditional tarot decks. 

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