frigidity vs impotence

frigidity

noun
  • Lack of natural heat and vigor of body; impotency. 

  • The state of being frigid; coldness; lack of heat. 

  • Coldness of feeling, manner or quality; lack of ardor, animation or vivacity. 

impotence

noun
  • Powerlessness; incapacity. 

  • Inability to copulate or beget children; sterility, erectile dysfunction, etc. 

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