bonanza vs bonus

bonanza

noun
  • Anything which is a great source of wealth or yields a large income or return. 

  • The point at which two mother lodes intersect. 

  • A rich mine or vein of silver or gold. 

bonus

noun
  • Something extra that is good; an added benefit. 

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

  • 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 

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