Apocalypse vs Rapture

Apocalypse

name
  • Revelation (last book of the Bible, composed of twenty-two chapters, which narrates the end of times) 

  • The written account of a revelation of hidden things given by God to a chosen prophet. 

Rapture

name
  • a prophesied sudden removal of Christian believers from the Earth before the Tribulation or simultaneous with the second coming of Jesus Christ 

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