Lady vs guardian

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. 

guardian

noun
  • A superior in a Franciscan monastery. 

  • A person legally responsible for a minor (in loco parentis). 

  • A person legally responsible for an incompetent person. 

  • Someone who guards, watches over, or protects. 

  • A major or final enemy; boss. 

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