disarticulate vs disunite

disarticulate

verb
  • To disjoint. 

  • To amputate (a limb) at a joint without cutting the bone. 

disunite

verb
  • To disintegrate; to come apart. 

  • To cause disagreement or alienation among or within. 

  • To separate, sever, or split. 

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