disengage vs sift

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 

sift

verb
  • To separate or scatter (things) as if by sieving. 

  • To sieve or strain (something). 

  • [+object] (archaic or old-fashioned) To scrutinise (someone or something) carefully so as to find the truth. 

  • [+ through (object)] To carefully go through a set of objects, or a collection of information, in order to find something. 

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