inlet vs roadstead

inlet

noun
  • A body of water let into a coast, such as a bay, cove, fjord or estuary. 

  • A passage that leads into a cavity. 

verb
  • To let in; admit. 

  • To carve the wooden stock of a firearm so as to position the metal components in it. 

  • To insert; inlay. 

roadstead

noun
  • A partly sheltered anchorage; a stretch of water near the shore where vessels may ride at anchor, but with less protection than a harbour. 

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