disengage vs fit together

disengage

noun
  • A circular movement of the blade that avoids the opponent's parry 

verb
  • To release or loosen from something that binds, entangles, holds, or interlocks. 

fit together

verb
  • To be able to be assembled in this way. 

  • To put the appropriate parts of (something) into a whole; to combine pieces that go together to create a finished object. 

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