cast iron vs helve

cast iron

noun
  • A hard and brittle, but strong, alloy of iron, carbon, and silicon, formed by casting in a mould. 

adj
  • Inflexible or without exception. 

  • Made of cast iron. 

  • Durable; tough; resilient. 

helve

noun
  • A forge hammer lifted by a cam acting on the helve between the fulcrum and the head. 

  • The handle or haft of a tool or weapon. 

verb
  • To furnish (an axe, etc.) with a helve. 

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