Lady vs ladyship

Lady

noun
  • 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. 

  • A high priestess. 

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. 

ladyship

noun
  • Term of respect for a woman of the peerage without using her title. 

  • Formal form of address for a lady judge (as opposed to the informal "judge"). 

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