slurp vs snarf

slurp

verb
  • To eat or drink noisily. 

  • To make a loud sucking noise. 

noun
  • A mouthful of liquid sucked up. 

  • A loud sucking noise, especially one made in eating or drinking. 

snarf

verb
  • To eat or consume greedily. 

  • To take something by dubious means, but without the connotations of stealing; to take something without regard to etiquette. 

  • To slurp (computing slang sense); to load in entirety; to copy as a whole. 

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