forecastle vs waist

forecastle

noun
  • A raised part of the upper deck at the front of a ship. 

  • Crew's quarters located at the forward part of a ship. 

waist

noun
  • That part of the upper deck of a ship between the quarterdeck and the forecastle. 

  • A part of a piece of clothing that covers the waist. 

  • The middle portion of the hull of a ship or the fuselage of an aircraft. 

  • The part of the body between the pelvis and the stomach. 

  • The narrow connection between the thorax and abdomen in certain insects (e.g., bees, ants and wasps). 

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