flippancy vs pertness

flippancy

noun
  • A disrespectful levity or pertness especially in respect to grave or sacred matters. 

pertness

noun
  • The quality of being pert; cheekiness, impudence. 

  • The quality of being pert; firmness (usually of breasts). 

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