solder vs weld

solder

verb
  • to join items together, or to coat them with solder 

  • to join things as if with solder. 

noun
  • Any of various easily-melted alloys, commonly of tin and lead, that are used to mend, coat, or join metal objects, usually small. 

  • Figuratively, circumstances or emotions that strongly bond things or persons together in analogy to solder that joins metals. 

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 solder and weld occurred in a corpus of books? (source: Google Ngram Viewer )