Apocalypse vs Visitation

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. 

Visitation

name
  • The visit of the Virgin Mary to her cousin Elizabeth; the commemoration of this on 30 May in Eastern Christianity or 31 May in Western Christianity. 

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