grime vs tailings

grime

noun
  • Dirt, grease, soot, etc. that is ingrained and difficult to remove. 

  • A genre of urban music that emerged in London, England, in the early 2000s, primarily a development of UK garage, dancehall, and hip hop. 

verb
  • To begrime; to cake with dirt. 

tailings

noun
  • The waste that remains after the minerals have been extracted from an ore by ore dressing. 

  • The feints, the last fraction of product obtained at the end of distillation. 

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