empty space vs oblivion

empty space

noun
  • A feeling of longing for someone or something that is gone; a sense of a thing's absence. 

  • Vacuum; a space containing nothing at all 

  • An unoccupied space where something may be stored 

  • An unoccupied area or volume. 

oblivion

noun
  • The state of forgetting completely, of being oblivious, unconscious, unaware, as when sleeping, drunk, or dead. 

  • A form of purgatory. 

  • The state of being completely forgotten, of being reduced to a state of non-existence, extinction, or nothingness, including through war and destruction. (Figuratively) for an area like hell, a wasteland. 

verb
  • To consign to oblivion; to efface utterly. 

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