afterworld vs nirvana

afterworld

noun
  • A supposed world that is entered after death; the realm of the afterlife. 

nirvana

noun
  • Complete cessation of suffering; a blissful state attained through realization of sunyata; enlightened experience. 

  • State of paradise; heightened or great pleasure. 

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