papilla vs udder

papilla

noun
  • A vascular process of connective tissue extending into and nourishing the root of a hair, feather, or developing tooth. 

  • Any of the small protuberances on the upper surface of the tongue often containing taste buds. 

  • A small fleshy projection on a plant. 

  • Any of the vascular protuberances of the dermal layer of the skin extending into the epidermal layer and often containing tactile corpuscles. 

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. 

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