price vs reward

price

noun
  • The cost of an action or deed. 

  • The cost required to gain possession of something. 

  • Value; estimation; excellence; worth. 

verb
  • To determine the monetary value of (an item); to put a price on. 

reward

noun
  • Something of value given in return for an act. 

  • A prize promised for a certain deed or catch 

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

verb
  • To give a reward to or for. 

  • To recompense. 

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