sip vs slurp

sip

noun
  • A small mouthful of drink 

verb
  • To drink slowly, small mouthfuls at a time. 

  • To drink a small quantity. 

  • To taste the liquor of; to drink out of. 

  • To consume slowly. 

slurp

noun
  • A mouthful of liquid sucked up. 

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

verb
  • To make a loud sucking noise. 

  • To eat or drink noisily. 

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