incentive vs prevention

incentive

adj
  • Inciting; encouraging or moving; rousing to action; stimulating. 

  • Serving to kindle or set on fire. 

noun
  • Something that motivates, rouses, or encourages. 

  • A bonus or reward, often monetary, to work harder. 

prevention

noun
  • precaution; forethought. 

  • Any measure intended to limit health-related risks (such as information campaigns, vaccination, early diagnosis etc.). 

  • The act of preventing or hindering; obstruction of action, access, or approach; thwarting. 

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