incongruity vs intelligibility

incongruity

noun
  • A thing that is incongruous. 

  • The state of being incongruous, or lacking congruence. 

  • An instance or point of disagreement 

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 incongruity and intelligibility occurred in a corpus of books? (source: Google Ngram Viewer )