disconnector vs prod

disconnector

noun
  • A switching device used to open an electric circuit when there is no current through it. They are used to isolate a part of an electrical system to allow the maintenance staff a safe access to it. 

prod

noun
  • A device (now often electrical) used to goad livestock into moving. 

  • A production; a created work. 

  • A light kind of crossbow; a prodd. 

  • A prick or stab with such a pointed instrument. 

  • A poke. 

verb
  • To encourage, to prompt. 

  • To prick with a goad. 

  • To poke, to push, to touch. 

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