crud vs smudge

crud

verb
  • To clog with dirt or debris. 

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

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. 

smudge

verb
  • To soil or smear with dirt. 

  • To subject to ritual burning of herbs (suffumigation, smudging). 

  • To stifle or smother with smoke. 

  • To obscure by blurring; to smear. 

  • To use dense smoke to protect from insects. 

  • To burn herbs as a cleansing ritual (suffumigation). 

noun
  • Dense smoke, such as that used for fumigation. 

  • A quantity of herbs used in suffumigation. 

  • A heap of damp combustibles partially ignited and burning slowly, placed on the windward side of a house, tent, etc. to keep off mosquitoes or other insects. 

  • A blemish or smear, especially a dark or sooty one. 

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