disengage vs untrammel

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 

untrammel

verb
  • To free or release from obstacles or hindrances. 

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