canvas vs roofing

canvas

noun
  • A type of coarse cloth, woven from hemp, useful for making sails and tents or as a surface for paintings. 

  • A piece of canvas cloth stretched across a frame on which one may paint. 

  • A basis for creative work. 

  • A painting, or a picture on canvas. 

  • A mesh of loosely woven cotton strands or molded plastic to be decorated with needlepoint, cross-stitch, rug hooking, or other crafts. 

  • A tent. 

  • A rough draft or model of a song, air, or other literary or musical composition; especially one to show a poet the measure of the verses he is to make. 

  • A region on which graphics can be rendered. 

  • Athletic shoes. 

  • Sails in general. 

verb
  • To cover (an area or object) with canvas. 

roofing

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

  • The process of constructing a roof or roofs. 

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

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