bonus vs forfeiture

bonus

verb
  • To pay a bonus, premium 

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. 

forfeiture

noun
  • The loss of forfeit property. 

  • The property lost as a forfeit. 

  • Any loss occasioned by one's own actions. 

  • A legal action whereby a person loses all interest in the forfeit property. 

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