cast iron vs chump

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. 

chump

noun
  • The thick end, especially of a piece of wood or of a joint of meat. 

  • An incompetent person, a blockhead; a loser. 

  • A gullible person; a sucker; someone easily taken advantage of; someone lacking common sense. 

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