accrual vs repayment

accrual

noun
  • from the creditor's viewpoint, a charge incurred in one accounting period that has not been, but is to be, paid by the end of it. 

  • An increase; something that accumulates, especially an amount of money that periodically accumulates for a specific purpose 

repayment

noun
  • The act of repaying. 

  • The act of revenge, an act of revenge. 

  • The money or other item that is repaid. 

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