haven vs molehead

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. 

molehead

noun
  • A stone bulwark forming a haven or harbour; a breakwater. 

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