fatuity vs rashness

fatuity

noun
  • Weakness or imbecility of mind; stupidity. 

  • Something fatuous; a stupid idea or utterance. 

rashness

noun
  • The quality of state of being rash; inconsiderate or presumptuous haste 

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