disengage vs unstick

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 

unstick

verb
  • To become freed from a stuck condition. 

  • To free from the condition of being stuck. 

  • To leave the ground during takeoff. 

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