curtain vs pale rider

curtain

noun
  • Death. 

  • That part of a wall of a building which is between two pavilions, towers, etc. 

  • A piece of cloth covering a window, bed, etc. to offer privacy and keep out light. 

  • A similar piece of cloth that separates the audience and the stage in a theater. 

  • The beginning of a show; the moment the curtain rises. 

  • The flat area of wall which connects two bastions or towers; the main area of a fortified wall. 

verb
  • To hide, cover or separate as if by a curtain. 

  • To cover (a window) with a curtain; to hang curtains. 

pale rider

noun
  • Death, the Grim Reaper or angel of death; and one of the Four Horsemen of the Apocalypse. 

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