pretext vs ruse

pretext

noun
  • A false, contrived, or assumed purpose or reason; a pretense. 

verb
  • To employ a pretext, which involves using a false or contrived purpose for soliciting the gain of something else. 

ruse

noun
  • An action intended to deceive; a trick. 

  • Cunning, guile, trickery. 

verb
  • To deceive or trick using a ruse. 

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