fanny vs weaker sex

fanny

noun
  • Women viewed as sexual objects. 

  • The female genitalia. 

  • The buttocks; arguably the most nearly polite of several euphemisms. 

  • Mess kettle or cooking pot. 

  • Sexual intercourse with a woman. 

weaker sex

noun
  • Women; the female gender. 

  • Used other than figuratively or idiomatically: see weaker, sex. 

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