co-opt vs subsume

co-opt

verb
  • To absorb or assimilate into an established group. 

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

  • To commandeer, appropriate or take over. 

subsume

verb
  • To place (any one cognition) under another as belonging to it; to include or contain something else. 

  • To consider an occurrence as part of a principle or rule; to colligate 

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