apocalypse vs warlock

apocalypse

noun
  • A revelation, especially of supernatural events. 

  • The Book of Revelation. 

  • The unveiling of events prophesied in the Revelation; the second coming and the end of life on Earth; global destruction. 

  • A disaster; a cataclysmic event; destruction or ruin. 

warlock

noun
  • A male magic-user; a male witch. 

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