foolishness vs frivolousness

foolishness

noun
  • The state of being foolish. 

  • A thing or event that is foolish, or an absurdity. 

frivolousness

noun
  • The result of being frivolous. 

  • The quality of being frivolous. 

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