Lady vs priestess

Lady

noun
  • A high priestess. 

  • An aristocratic title for a woman; the wife of a lord and/or a woman who holds the position in her own right; a title for a peeress, the wife of a peer or knight, and the daughters and daughters-in-law of certain peers. 

name
  • The title for the (primary) female deity in female-centered religions. 

  • The major supernatural figurehead in the Wiccan religion, a triune goddess split into the Mother, Maiden, and Crone. 

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 Lady and priestess occurred in a corpus of books? (source: Google Ngram Viewer )