chastity vs impurity

chastity

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

impurity

noun
  • A component or additive that renders something else impure. 

  • The condition of being impure; because of contamination, pollution, adulteration or insufficient purification. 

  • A state of immorality or sin; especially the weakness of the flesh: inchastity. 

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