disengage vs shake off

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 

shake off

verb
  • To remove (something attached to, on or clinging to an object) by shaking. 

  • To rid oneself of a malady or its symptoms 

  • Some rumors that the governor had smoked pot as a teenager were flying around, but he has finally managed to shake them off. 

  • To lose someone who is tracking you 

  • To dissociate oneself from (an allegation or rumour). 

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