bonus vs offertory

bonus

noun
  • An extra sum given as a premium, e.g. to an employee or to a shareholder. 

  • Something extra that is good; an added benefit. 

  • An addition to the player's score based on performance, e.g. for time remaining. 

  • One or more free throws awarded to a team when the opposing team has accumulated enough fouls. 

verb
  • To pay a bonus, premium 

offertory

noun
  • A linen or silken cloth anciently used in various ceremonies connected with the administration of the Eucharist. 

  • A prayer said or sung as an anthem while offerings of bread and wine are placed on the altar during the Roman Catholic Mass or the Anglican Communion service. 

  • The part of the Eucharist service when offerings of bread and wine are placed on the altar and when any collection is taken; also, the money or other things collected. 

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