intertidal zone vs waterside

intertidal zone

noun
  • The part of a shore between high water and low water, especially the beach exposed at maximum ebb spring tides. 

waterside

noun
  • The land bordering a body of water 

adj
  • of, pertaining to or situated on a waterside 

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