disengage vs hold tight

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 

hold tight

verb
  • To hold onto something securely or closely. 

  • To remain patient, until a specified event occurs. 

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