knurl vs nugget

knurl

noun
  • A lined or crossgrained pattern of ridges or indentations rolled or pressed into a part for grip. 

  • A crossgrained protuberance; a nodule; a boss or projection. 

  • A contorted knot in wood. 

verb
  • To roll or press a pattern of ridges or indentations into a part for grip. 

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. 

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