disengage vs unentangle

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 

unentangle

verb
  • To reverse the process of entanglement 

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