disarticulate vs disengage

disarticulate

verb
  • To disjoint. 

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

disengage

verb
  • To release or loosen from something that binds, entangles, holds, or interlocks. 

noun
  • A circular movement of the blade that avoids the opponent's parry 

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