causticness vs mockery

causticness

noun
  • The state or quality of being caustic. 

mockery

noun
  • Something so lacking in necessary qualities as to inspire ridicule; a laughing-stock. 

  • The action of mocking; ridicule, derision. 

  • Mimicry, imitation, now usually in a derogatory sense; a travesty, a ridiculous simulacrum. 

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