raw material vs specialty

raw material

noun
  • Any physical product serving as input to a factory or other installation which processes it. 

  • A material in its unprocessed, natural state considered usable for manufacture. 

specialty

noun
  • A product that originates in and is characteristic of a place. 

  • A particular or peculiar case. 

  • An attribute or quality peculiar to a species. 

  • That in which one specializes; a chosen expertise or talent. 

  • A contract or obligation under seal; a contract by deed; a writing, under seal, given as security for a debt particularly specified. 

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