burp vs burping

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. 

burping

noun
  • The sound of a burp. 

  • The act by which a baby, or a container of fermenting substance, is burped. 

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