chastity vs spinsterhood

chastity

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

spinsterhood

noun
  • The condition of being a spinster. 

  • The time during which one is a spinster. 

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