hull vs papilla

hull

noun
  • The outer covering of a fruit or seed. 

  • Any covering. 

  • The body or frame of a vessel, such as a ship or plane. 

  • The smallest set that possesses a particular property (such as convexity) and contains every point of A; slightly more formally, the intersection of all sets which possess the specified property and of which A is a subset. 

verb
  • To hit (a ship) in the hull with cannon fire etc. 

  • To remove the outer covering of a fruit or seed. 

papilla

noun
  • A small fleshy projection on a plant. 

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

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

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

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