illumination vs obfuscation

illumination

noun
  • Adornment of books and manuscripts with colored illustrations. See illuminate (transitive verb). 

  • Festive decoration of houses or buildings with lights. 

  • Enlightening influence; inspiration. 

  • The act of illuminating, or supplying with light; the state of being illuminated. 

  • Splendour; brightness. 

obfuscation

noun
  • Confusion, bewilderment, or a baffled state resulting from something obfuscated, or made more opaque and muddled with the intent to obscure information. 

  • The alteration of computer code to preserve its behavior while concealing its structure and intent. 

  • The act or process of obfuscating, or obscuring the perception of something; the concept of concealing the meaning of a communication by making it more confusing and harder to interpret. 

  • A single instance of intentionally obscuring the meaning of something to make it more difficult to grasp. 

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