debt vs interest

debt

noun
  • An action, state of mind, or object one has an obligation to perform for another, adopt toward another, or give to another. 

  • Money that one person or entity owes or is required to pay to another, generally as a result of a loan or other financial transaction. 

  • The state or condition of owing something to another. 

  • An action at law to recover a certain specified sum of money alleged to be due 

interest

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

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

  • 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. 

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

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