machination vs subterfuge

machination

noun
  • The act of machinating or plotting. 

  • A clever scheme or artful plot, usually crafted for evil purposes. 

subterfuge

noun
  • Deception; misrepresentation of the true nature of an activity. 

  • An indirect or deceptive device or stratagem; a blind. Refers especially to war and diplomatics. 

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