engaged vs incentive

engaged

adj
  • being attacked or attacking 

  • Having the widest part of its presenting part, usually the head, enter the pelvic brim or inlet. 

  • Greatly interested. 

  • Busy or employed. 

  • attached to a wall or sunk into it halfway 

  • (of a telephone) Already involved in a telephone call when a third party calls. 

  • Having agreed to marry a particular person (one's fiancé or fiancée) or each other. 

  • Synonym of engagé (“passionately committed to a cause”) 

  • in contact and in operation 

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 engaged and incentive occurred in a corpus of books? (source: Google Ngram Viewer )