littoral vs water's edge

littoral

noun
  • A shore. 

  • The zone of a coast between high tide and low tide levels. 

adj
  • Of or relating to the shore, especially the seashore. 

water's edge

noun
  • The edge of any body of water, such as a lake or sea. 

How often have the words littoral and water's edge occurred in a corpus of books? (source: Google Ngram Viewer )