belching vs burp

belching

noun
  • The act of producing a belch. 

burp

noun
  • A belch. 

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. 

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