beachside vs intertidal zone

beachside

noun

  • The land bordering a beach. 

adj

  • Bordering a beach 

intertidal zone

noun

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

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