udder vs whelpie

udder

noun
  • An organ formed of the mammary glands of female quadruped mammals, particularly ruminants such as cattle, goats, sheep and deer. 

  • A woman's breast. 

whelpie

noun
  • A small whelp, especially a little cub or puppy; a cur. 

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