delicacy vs propriety

delicacy

noun
  • Frailty of health or fitness. 

  • Something appealing, usually a pleasing food, especially a choice dish of a certain culture suggesting rarity and refinement. 

  • The quality of being delicate. 

  • Refinement in taste or discrimination. 

  • Fineness or elegance of construction or appearance. 

  • Tact and propriety; the need for such tact. 

propriety

noun
  • Suitability, fitness; the quality of being appropriate. 

  • The fact of possessing something; ownership. 

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

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