robot vs undead

robot

noun
  • An intelligent mechanical being designed to look like a human or other creature, and usually made from metal. 

  • A habitual poster on the /r9k/ board on 4chan; a member of the /r9k/ community. 

  • A theodolite which follows the movements of a prism and can be used by a one-man crew. 

  • A traffic light (from earlier robot policeman). 

  • A style of dance popular in disco in which the dancer imitates the stiff movements of a stereotypical android robot. 

  • A machine built to carry out some complex task or group of tasks by physically moving, especially one which can be programmed. 

  • A person who does not seem to have any emotions. 

  • A system of serfdom used in Central Europe, under which a tenant's rent was paid in forced labour. 

undead

noun
  • A creature that is undead; that is, dead but still animate. 

  • Those creatures which are undead; that is, dead yet still animate. 

adj
  • Being animate, though non-living. 

  • Pertaining to a corpse, though having qualities of life. 

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