forecastle vs storey

forecastle

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

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

storey

noun
  • A floor or level of a building or ship. 

  • A vertical level in certain letters, such as a and g. 

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