chastity vs continence

chastity

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

continence

noun
  • Moderation or self-restraint, especially in sexual activity; abstinence. 

  • The voluntary control of urination and defecation. 

  • Uninterrupted course; continuity. 

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