frigidity vs zest

frigidity

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

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

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

zest

verb
  • To scrape the zest from a fruit. 

  • To make more zesty. 

noun
  • The outer skin of a citrus fruit, used as a flavouring or garnish. 

  • General vibrance of flavour. 

  • Enthusiasm; keen enjoyment; relish; gusto. 

  • The woody, thick skin enclosing the kernel of a walnut. 

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