detach vs disassociate

detach

verb
  • To separate for a special object or use. 

  • To take apart from; to take off. 

  • To come off something. 

disassociate

verb
  • To separate (oneself); to dissolve one's association with a person, group, or situation. 

  • To separate into smaller discrete units, as with analysis. 

  • To separate; to disunite; to disintegrate; to dissolve. 

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