disengage vs loosen

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 

loosen

verb
  • To disengage (a device that restrains). 

  • To make loose. 

  • To free from restraint; to set at liberty. 

  • To become unfastened or undone. 

  • To relieve (the bowels) from constipation; to promote defecation. 

  • To become loose. 

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