crud vs purity

crud

verb
  • To clog with dirt or debris. 

noun
  • A fast-paced game, loosely based on billiards or pool, with many players participating at the same time. 

  • Mixed impurities, especially wear and corrosion products in nuclear reactor coolant. 

  • Something of poor quality. 

  • A heavy wet snow on which it is difficult to travel. 

  • Venereal disease, or (by extension) any disease. 

  • A contemptible person. 

  • Dirt, filth or refuse. 

  • Feces; excrement. 

intj
  • Non-vulgar interjection expressing annoyance, anxiety, etc.; sugar, damn. 

purity

noun
  • The state or degree of being pure. 

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