burp vs yak

burp

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

  • To utter by burping 

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

  • To emit a burp. 

noun
  • A belch. 

yak

verb
  • To vomit, usually as a result of excessive alcohol consumption. 

  • To talk, particularly informally but persistently; to chatter or prattle. 

noun
  • An ox-like mammal native to the Himalayas, Mongolia, Burma, and Tibet with dark, long, and silky hair, a horse-like tail, and a full, bushy mane. 

  • A talk, particular an informal talk; chattering; gossip. 

  • A laugh. 

  • Vomit. 

  • A kayak. 

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