chastity vs libertinism

chastity

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

libertinism

noun
  • A lifestyle or pattern of behavior characterized by self-indulgence and lack of restraint, especially one involving sexual promiscuity and rejection of religious or other moral authority. 

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