curtain vs roofing

curtain

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

  • Death. 

  • 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. 

roofing

noun
  • A way of travel which consists in clambering over the roofs of skyscrapers. 

  • The process of constructing a roof or roofs. 

  • Material used on the outside of a roof, such as shingles. 

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