apocalypse vs end of the world

apocalypse

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

  • 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 revelation, especially of supernatural events. 

end of the world

noun
  • Any change that seems catastrophic or devastating. 

  • Destruction of Earth. 

  • Death and destruction of life on Earth, especially human. 

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