eternity vs life after death

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. 

life after death

noun
  • The state of afterlife; existence in heaven. 

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