bluffing vs trickery

bluffing

noun
  • A bluff; a false expression of the strength of one's position in order to intimidate. 

trickery

noun
  • Deception or underhanded behavior. 

  • The art of dressing up; imposture. 

  • Artifice; the use of one or more stratagems. 

  • An instance of deception, underhanded behavior, dressing up, imposture, artifice, etc. 

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