dissociate vs set apart

dissociate

verb
  • To make unrelated; to sever a connection; to separate. 

  • To undergo dissociation. 

  • To part; to stop associating. 

  • To separate compounds into simpler component parts, usually by applying heat or through electrolysis. 

set apart

verb
  • Used other than figuratively or idiomatically: to separate or isolate. 

  • To distinguish, make obvious the distinction between (two things) or of (something). 

  • To select (something or someone) for a specific purpose. 

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