propriety vs reasonability

propriety

noun
  • Correctness in behaviour and morals; good manners, seemliness. 

  • The fact of possessing something; ownership. 

  • Suitability, fitness; the quality of being appropriate. 

reasonability

noun
  • The state or quality of being reasonable; reasonableness. 

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