reward vs tax

reward

verb
  • To give a reward to or for. 

  • To recompense. 

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. 

tax

verb
  • To impose and collect a tax on (something). 

  • To impose and collect a tax from (a person or company). 

  • To accuse. 

  • To make excessive demands on. 

  • To examine accounts in order to allow or disallow items. 

noun
  • A burdensome demand. 

  • A task exacted from one who is under control; a contribution or service, the rendering of which is imposed upon a subject. 

  • Money paid to the government other than for transaction-specific goods and services. 

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