cattle prod vs stock prod

cattle prod

noun
  • 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. 

  • Something used to goad or push someone to act. 

verb
  • To goad or push someone to act. 

stock prod

noun
  • Synonym of cattle prod 

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