passion vs zest

passion

noun
  • A true desire sustained or prolonged. 

  • Fervor, determination. 

  • A display, musical composition, or play meant to commemorate the suffering of Jesus. 

  • The suffering of Jesus leading up to and during his crucifixion. 

  • An object of passionate or romantic love or strong romantic interest. 

  • Any great, strong, powerful emotion, especially romantic love or extreme hate. 

  • Sexual intercourse, especially when very emotional. 

verb
  • To give a passionate character to. 

zest

noun
  • Enthusiasm; keen enjoyment; relish; gusto. 

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

  • General vibrance of flavour. 

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

verb
  • To scrape the zest from a fruit. 

  • To make more zesty. 

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