anchorage vs roadstead

anchorage

noun
  • A harbor, river, or offshore area that can accommodate a ship at anchor, either for quarantine, queuing, or discharge. 

  • That into which something is anchored or fastened. 

  • The set of anchors belonging to a ship. 

  • Something on which one may depend for security; ground of trust. 

  • The retreat of a hermit, or anchorite. 

  • The act of anchoring, or the condition of lying at anchor. 

  • The surgical fixation of prolapsed organs. 

  • A fee charged for anchoring. 

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 anchorage and roadstead occurred in a corpus of books? (source: Google Ngram Viewer )