pretext vs whopper

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. 

whopper

noun
  • An outrageous or blatant lie. 

  • Something remarkably large. 

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