interest vs passion

interest

verb
  • To engage the attention of; to awaken interest in; to excite emotion or passion in, in behalf of a person or thing. 

noun
  • A great attention and concern from someone or something; intellectual curiosity. 

  • An involvement, claim, right, share, stake in or link with a financial, business, or other undertaking or endeavor. 

  • The price paid for obtaining, or price received for providing, money or goods in a credit transaction, calculated as a fraction of the amount or value of what was borrowed. 

  • Condition or quality of exciting concern or being of importance. 

  • Any excess over and above an exact equivalent 

  • The persons interested in any particular business or measure, taken collectively. 

  • Something or someone one is interested in. 

  • Attention that is given to or received from someone or something. 

passion

verb
  • To give a passionate character to. 

noun
  • 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. 

  • A true desire sustained or prolonged. 

  • Sexual intercourse, especially when very emotional. 

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