inappropriateness vs incongruity

inappropriateness

noun
  • The quality of being inappropriate; unsuitability. 

  • The result of being inappropriate. 

incongruity

noun
  • The state of being incongruous, or lacking congruence. 

  • A thing that is incongruous. 

  • An instance or point of disagreement 

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