burp vs heft

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. 

heft

noun
  • An animal that has become hefted thus. 

  • Weight. 

  • Heaviness, the feel of weight; heftiness. 

  • A piece of mountain pasture to which a farm animal has become hefted (accustomed). 

  • Poor condition in sheep caused by mineral deficiency. 

  • The act or effort of heaving; violent strain or exertion. 

  • Influence; importance. 

  • A number of sheets of paper fastened together, as for a notebook. 

  • A part of a serial publication. 

verb
  • To make (a farm animal, especially a flock of sheep) accustomed and attached to an area of mountain pasture. 

  • To test the weight of something by lifting it. 

  • To lift up; especially, to lift something heavy. 

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