benighted vs enlightened

benighted

adj
  • Lacking education or knowledge; unenlightened; also, lacking morality; immoral, unscrupulous. 

enlightened

adj
  • Exceedingly wise. 

  • Made aware of something. 

  • Freed from illusion. 

  • Educated or informed. 

noun
  • Someone who has been introduced to the mysteries of some activity, religion especially Buddhism 

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