continence vs spinsterhood

continence

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

  • The voluntary control of urination and defecation. 

  • Uninterrupted course; continuity. 

spinsterhood

noun
  • The condition of being a spinster. 

  • The time during which one is a spinster. 

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