appoint vs co-opt

appoint

verb
  • To equip (someone) with (something); to assign (someone) authoritatively (some equipment). 

  • To name (someone to a post or role). 

  • To set, fix or determine (a time or place for something such as a meeting, or the meeting itself) by authority or agreement. 

  • To fix the disposition of (property) by designating someone to take use of (it). 

  • To furnish or equip (a place) completely; to provide with all the equipment or furnishings necessary; to fit out. 

co-opt

verb
  • To commandeer, appropriate or take over. 

  • To absorb or assimilate into an established group. 

  • To elect as a fellow member of a group, such as a committee. 

How often have the words appoint and co-opt occurred in a corpus of books? (source: Google Ngram Viewer )