introduce vs wrap up

introduce

verb
  • To add (something) to a system, a mixture, or a container. 

  • To cause (someone) to be acquainted (with someone else). 

  • To bring (something) into practice. 

  • To make (something or someone) known by formal announcement or recommendation. 

wrap up

verb
  • To combine, incorporate or encapsulate into one thing. 

  • To summarize or recapitulate. 

  • To hide or cover up. 

  • To conclude or finish completely. 

  • To cover or enclose (something) by folding and securing a covering entirely around it. 

  • To put on abundant clothing as protection from the cold; to bundle up. 

  • To curl into a more compact form. 

  • To tie up; to make too busy to respond. 

  • To cocoon; to surround protectively. 

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