cost vs reward

cost

noun
  • A negative consequence or loss that occurs or is required to occur. 

  • Quality; condition; property; value; worth; a wont or habit; disposition; nature; kind; characteristic. 

  • Amount of money, time, etc. that is required or used. 

  • A cottise. 

verb
  • To cause something to be lost; to cause the expenditure or relinquishment of. 

  • To require to be borne or suffered; to cause. 

  • To calculate or estimate a price. 

  • To incur a charge of; to require payment of a (specified) price. 

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 cost and reward occurred in a corpus of books? (source: Google Ngram Viewer )