illusion vs pretense

illusion

noun
  • The state of being deceived or misled. 

  • A misapprehension; a belief in something that is in fact not true. 

  • Anything that seems to be something that it is not. 

  • A magician’s trick. 

pretense

noun
  • A false or hypocritical profession 

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

  • Intention or purpose not real but professed. 

  • An unsupported claim made or implied. 

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