pretense vs shrouding

pretense

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

  • Intention or purpose not real but professed. 

  • A false or hypocritical profession 

  • An unsupported claim made or implied. 

shrouding

noun
  • A shroud (annular plate at the periphery of a water wheel, forming side of bucket). 

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