deckhouse vs harborage

deckhouse

noun
  • A cabin that protrudes above a ship's deck. 

harborage

noun
  • A place for refuge for a vessel. 

  • A condition on land favorable to infestation by animals considered pests. 

  • A place of shelter or entertainment. 

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