affiliate vs disunite

affiliate

verb
  • To adopt; to receive into a family as one's offspring 

  • To connect in the way of descent; to trace origin to. 

  • to bring or receive into close connection; to ally. 

  • To fix the paternity of 

  • To attach (to) or unite (with); to receive into a society as a member, and initiate into its mysteries, plans, etc. 

noun
  • Someone or something, especially, a television station, that is associated with a larger, related organization, such as a television network; a member of a group of associated things. 

disunite

verb
  • To cause disagreement or alienation among or within. 

  • To separate, sever, or split. 

  • To disintegrate; to come apart. 

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