burp vs eructation

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. 

eructation

noun
  • The act of belching, of expelling gas from the stomach through the mouth. 

  • An erumpent blast of gas, wind, or other matter ejected from the depths of the earth. 

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