eternity vs spiritual world

eternity

noun
  • The remainder of time that elapses after death. 

  • Existence without end, infinite time. 

  • A period of time which extends infinitely far into the future. 

  • Existence outside of time. 

  • A comparatively long time. 

spiritual world

noun
  • The afterlife. 

  • A metaphysical plane of existence parallel to the material world and occupied by spirits and other unearthly forces. 

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