interest vs involve

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. 

involve

verb
  • To cause or engage (someone or something) to participate or to become connected or implicated. 

  • To take in; to gather in; to mingle, blend or merge. 

  • To comprise or include; to have as a related part. 

  • To complicate or make intricate. 

  • To envelop, enfold, entangle. 

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