mot vs weaker sex

mot

noun
  • A woman; a wife. 

  • A witty remark; a witticism; a bon mot. 

  • A prostitute. 

  • A landlady. 

weaker sex

noun
  • Women; the female gender. 

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

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