cattle prod vs get at

cattle prod

verb
  • To goad or push someone to act. 

noun
  • Something used to goad or push someone to act. 

  • A stick designed to goad cows, steers, and similar animals in order to prompt them to move in a desired direction, now usually electrified to administer a stimulating shock to the animal. 

get at

verb
  • To persuade by intimidation, to tamper with. 

  • To manage to gain access to. 

  • To understand or ascertain by investigation. 

  • To begin working on or dealing with. 

  • To contact someone. 

  • To attack verbally or physically; to annoy, bother. 

  • To mean, signify. 

How often have the words cattle prod and get at occurred in a corpus of books? (source: Google Ngram Viewer )