continence vs self-abnegation

continence

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

  • The voluntary control of urination and defecation. 

  • Uninterrupted course; continuity. 

self-abnegation

noun
  • The denial or invalidation of one's own needs, interests, etc. for the sake of another's; the setting aside of self-interest. 

  • An act of self-denial. 

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