foolishness vs intelligibility

foolishness

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

  • The state of being foolish. 

intelligibility

noun
  • The quality of recorded speech of every word being understandable. 

  • That which is intelligible; the degree to which something is intelligible. 

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