envy vs incentive

envy

noun
  • An object of envious notice or feeling. 

  • Resentful desire of something possessed by another or others (but not limited to material possessions). 

verb
  • To feel displeasure or hatred towards (someone) for their good fortune or possessions. 

  • To resentfully or discontentedly desire (something someone else has that one lacks). 

incentive

noun
  • Something that motivates, rouses, or encourages. 

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

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

  • Serving to kindle or set on fire. 

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