disengage vs divaricate

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 

divaricate

verb
  • To spread apart; to (cause to) diverge or branch off. 

adj
  • Having wide angles between the branches. 

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