cast iron vs galling

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. 

galling

noun
  • Material transfer caused by adhesion between sliding surfaces, potentially resulting in wear or binding. 

adj
  • Vexing, humiliating; eliciting indignation or bitterness. 

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