whelp vs yellow dog

whelp

noun
  • An insolent youth; a mere child. 

  • One of several wooden strips to prevent wear on a windlass on a clipper-era ship. 

  • A young offspring of a canid (ursid, felid, pinniped), especially of a dog or a wolf, the young of a bear or similar mammal (lion, tiger, seal); a pup, wolf cub. 

  • A tooth on a sprocket wheel (compare sprocket and cog). 

verb
  • To give birth. 

yellow dog

noun
  • An item or person of low value. 

  • Used other than figuratively or idiomatically: see yellow, dog. 

  • A Carolina dog. 

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