burp vs perk

burp

verb
  • To open (a container of fermenting substance) to allow the release of accumulated gas. 

  • To cause someone (such as a baby) to burp. 

  • To utter by burping 

  • To emit a burp. 

noun
  • A belch. 

perk

verb
  • Of coffee: to be produced by heated water seeping (“percolating”) through coffee grounds. 

  • To make trim or smart; to straighten up; to erect; to make a jaunty or saucy display of. 

  • To appear from below or behind something, emerge, pop up, poke out. 

  • To make (coffee) in a percolator or a drip coffeemaker. 

noun
  • Perquisite. 

  • A percolator, particularly of coffee. 

  • A bonus ability that a player character can acquire; a permanent power-up. 

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