beast vs beast of burden

beast

noun
  • A domestic animal, especially a bovine farm animal. 

  • Someone who is particularly impressive, especially athletically or physically. 

  • A monstrously unusual and dangerous animal. 

  • Any animal other than a human; usually only applied to land vertebrates, especially large or dangerous four-footed ones. 

  • Anything regarded as larger or more powerful than one of its normal size or strength. 

  • A person who behaves in a violent, antisocial or uncivilized manner. 

  • A sex offender. 

  • Something unpleasant and difficult. 

  • A thing or matter, especially a difficult or unruly one. 

adj
  • great; excellent; powerful 

verb
  • to engage in sexual intercourse, particularly in an illicit context 

  • to impose arduous exercises, either as training or as punishment. 

beast of burden

noun
  • Any domesticated animal trained to perform tasks for humans, such as a herding dog or trained falcon. 

  • A draught animal, such as a donkey, mule, llama, camel, horse, or ox, that carries or pulls a load for the benefit of a human. 

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