cattle prod vs provocation

cattle prod

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. 

verb
  • To goad or push someone to act. 

provocation

noun
  • The act of provoking, inciting or annoying someone into doing something 

  • The second step in OPQRST regarding the investigation of what makes the symptoms MOI or NOI improve or deteriorate. 

  • Something that provokes; a provocative act 

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