Lady Muck vs nonentity

Lady Muck

name
  • An appellation given to a woman who behaves in a perceived aristocratic manner. 

nonentity

noun
  • an unimportant or insignificant person 

  • the state of not existing; nonexistence 

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