illustrative vs involved

illustrative

adj
  • Demonstrative, exemplative, showing an example or demonstrating. 

involved

adj
  • Complicated. 

  • Having an affair with someone. 

  • Associated with others, be a participant or make someone be a participant (in a crime, process, etc.) 

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