ruse vs subterfuge

ruse

noun
  • An action intended to deceive; a trick. 

  • Cunning, guile, trickery. 

verb
  • To deceive or trick using a ruse. 

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 ruse and subterfuge occurred in a corpus of books? (source: Google Ngram Viewer )