pertness vs sass

pertness

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

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

sass

noun
  • Backtalk, cheek, sarcasm. 

verb
  • To talk, to talk back. 

  • To speak insolently to. 

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