conceptualization vs illusion

conceptualization

noun
  • The process of forming a conceptual form of a phenomenon; the act of conceptualizing 

  • The concept so formed; something conceptualized 

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. 

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