blend vs smelting

blend

verb
  • To be mingled or mixed. 

  • To mingle; to mix; to unite intimately; to pass or shade insensibly into each other. 

noun
  • A mixture of two or more things. 

  • A word formed by combining two other words; a grammatical contamination, portmanteau word. 

smelting

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

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