chastity vs decency

chastity

noun
  • The quality of being chaste: the state of abstaining from any sexual activity considered immoral; avoidance of sexual sins. 

decency

noun
  • The quality of being decent; propriety. 

  • That which is proper or becoming. 

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