accrual vs supplement

accrual

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

  • 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. 

supplement

noun
  • A surcharge, additional cost, especially for food in a restaurant. 

  • A vitamin, herbal extract or chemical compound ingested to meet dietary deficiencies or enhance muscular development. 

  • Something added, especially to make up for a deficiency. 

  • An additional section of a newspaper devoted to a specific subject. 

  • An angle that, when added to a given angle, makes 180°; a supplementary angle. 

  • An extension to a document or publication that adds information, corrects errors or brings up to date. 

verb
  • To provide or make a supplement to something. 

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