illumination vs revelation

illumination

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

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

  • Festive decoration of houses or buildings with lights. 

  • Enlightening influence; inspiration. 

  • Splendour; brightness. 

revelation

noun
  • The act of revealing or disclosing. 

  • Something that turns out to be a great success. 

  • Something dramatically disclosed. 

  • A manifestation of divine truth. 

  • Something that is revealed. 

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