frigidity vs taciturnity

frigidity

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

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

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

taciturnity

noun
  • The trait of being taciturn. 

  • Failure to assert a legal right in a way that implies that it is being given up. 

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