instate vs introduce

instate

verb
  • To install (someone) in office; to establish. 

introduce

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

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

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

  • To bring (something) into practice. 

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