drilling rig vs ruse

drilling rig

noun
  • Used other than figuratively or idiomatically: see drilling, rig. 

  • An oil rig. 

ruse

noun
  • Cunning, guile, trickery. 

  • An action intended to deceive; a trick. 

verb
  • To deceive or trick using a ruse. 

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