demilitarized zone vs oblivion

demilitarized zone

noun
  • An area, often on a border between military factions, in which military forces and operations are prohibited. 

  • A subnetwork of a LAN, exposed to the internet or another untrusted network but firewalled off from the rest of the LAN. 

oblivion

verb
  • To consign to oblivion; to efface utterly. 

noun
  • 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. 

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

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