incorporate vs introduce

incorporate

verb
  • To mix (something in) as an ingredient; to blend 

  • To admit as a member of a company 

  • To form into a legal company. 

  • To include (another clause or guarantee of the US constitution) as a part (of the Fourteenth Amendment, such that the clause binds not only the federal government but also state governments). 

  • To include (something) as a part. 

  • To form into a body; to combine, as different ingredients, into one consistent mass. 

  • To unite with a material body; to give a material form to; to embody. 

adj
  • Not consisting of matter; not having a material body; incorporeal; spiritual. 

  • Not incorporated; not existing as a corporation. 

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. 

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