prod vs yolk

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. 

yolk

noun
  • The grease in a sheep's fleece; lanolin. 

  • The yellow, spherical part of an egg that is surrounded by the white albumen, and serves as nutriment for the growing young. 

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