depravity vs libertinism

depravity

noun
  • The state or condition of being depraved; moral debasement. 

  • Inborn corruption, entailing the belief that every facet of human nature has been polluted, defiled, and contaminated by sin. 

  • A particular depraved act or trait. 

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 depravity and libertinism occurred in a corpus of books? (source: Google Ngram Viewer )