pretense vs smokescreen

pretense

noun
  • Intention or purpose not real but professed. 

  • An insincere attempt to reach a specific condition or quality. 

  • A false or hypocritical profession 

  • An unsupported claim made or implied. 

smokescreen

noun
  • Anything used metaphorically to conceal or distract. 

  • Smoke used as a disguise, mask or cover, as of troops in battle. 

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