haven vs isle

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. 

isle

noun
  • A (small) island, compare with islet. 

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