smelt vs weld

smelt

verb
  • To fuse or melt two things into one, especially in order to extract metal from ore; to meld. 

noun
  • Any small anadromous fish of the family Osmeridae, found in the Atlantic and Pacific Oceans and in lakes in North America and northern part of Europe. 

  • Production of metal, especially iron, from ore in a process that involves melting and chemical reduction of metal compounds into purified metal. 

  • Any of the various liquids or semi-molten solids produced and used during the course of such production. 

weld

verb
  • To join two materials (especially two metals) together by applying heat, pressure and filler, either separately or in any combination. 

  • To bind together inseparably; to unite closely or intimately. 

noun
  • The joint made by welding. 

  • A herb (Reseda luteola) related to mignonette, growing in Europe, and to some extent in America, used to make a yellow dye. 

  • The yellow coloring matter or dye extracted from this plant. 

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