haven vs roadstead

haven

noun
  • A harbour or anchorage protected from the sea. 

  • A peaceful place. 

  • A place of safety. 

verb
  • To put into, or provide with a haven. 

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