foundry vs smelting

foundry

noun
  • A facility that melts metals in special furnaces and pours the molten metal into molds to make products. Foundries are usually specified according to the type of metal dealt with: iron foundry, brass foundry, etc. 

  • The act, process, or art of casting metals; founding. 

  • A plant that produces chips out of semiconductors in the microelectronics industry. 

smelting

noun
  • The process of melting or fusion, especially to extract a metal from its ore. 

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