bright spot vs reward

bright spot

noun
  • A good part of something that is otherwise fairly bad or unpleasant. 

  • Used other than figuratively or idiomatically: see bright, spot. 

reward

noun
  • The result of an action, whether good or bad. 

  • Something of value given in return for an act. 

  • A prize promised for a certain deed or catch 

verb
  • To give a reward to or for. 

  • To recompense. 

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