expressive vs incentive

expressive

adj
  • Effectively conveying thought or feeling. 

noun
  • Any word or phrase that expresses (that the speaker, writer, or signer has) a certain attitude toward or information about the referent. 

  • A word or phrase, belonging to a distinct word class or having distinct morphosyntactic properties, with semantic symbolism (for example, an onomatopoeia), variously considered either a synonym, a hypernym or a hyponym of ideophone. 

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. 

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