heads vs shoetree

heads

noun
  • The side of a coin that bears the picture of the head of state or similar. 

  • That part of older sailing ships forward of the forecastle and around the beak, used by the crew as their lavatory; still used as the word for toilets on a ship. 

  • High-grade marijuana. 

  • The draft scheme of a bill before it is formally introduced to a parliament. 

  • Tiles laid at the eaves of a house. 

intj
  • A shouted warning that something is falling from above, mind your heads; heads-up. 

shoetree

noun
  • A foot-shaped device placed in a shoe to maintain its shape when not being worn. 

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