chastity vs concupiscence

chastity

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

concupiscence

noun
  • the desire of a person's lower appetite, contrary to reason, which subjugates and inclines them to experience temptation and to give in to sin, due to the Fall and original sin. 

  • An ardent desire, especially sexual desire; lust. 

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