nugget vs tubercle

nugget

noun
  • A small, compact chunk or clump. 

  • A tidbit of something valuable. 

  • A small piece of tasty food, a tidbit. 

  • A type of boot polish. 

  • A chicken nugget. 

  • An inexperienced, newly trained fighter pilot. 

  • A bud from the Cannabis sativa plant, especially one that is potent. 

  • A partial description gleaned from data mining. 

  • A person with no arms or legs; a basket case. 

tubercle

noun
  • A round nodule, small eminence, or warty outgrowth, especially those found on bones for the attachment of a muscle or ligament or small elevations on the surface of a tooth. 

  • A small rounded nodule forming the characteristic lesion of tuberculosis. 

  • A small rounded wartlike protuberance of the roots of some leguminous plants; the lip of certain orchids, cacti. 

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