dripstone vs molding

dripstone

noun
  • A protective moulding over a door or window that allows rain to drip away from the structure. 

  • Stalactites and stalagmites collectively. 

  • A water filter in which impurities are removed by running water through a porous stone. 

molding

noun
  • A mill for shaping timber. 

  • Anything cast in a mold, or which appears to be so, as grooved or ornamental bars of wood or metal. 

  • A machine to assist in making molds for castings. 

  • The act or process of shaping in or on a mold, or of making molds; the art or occupation of a molder. 

  • A plane, or curved, narrow surface, either sunk or projecting, used for decoration by means of the lights and shades upon its surface and to conceal joints, especially between unlike materials. 

  • A planing machine for making moldings. 

  • A kind of sand containing clay, used in making molds. 

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