backbeach vs seaside

backbeach

noun
  • The area of beach furthest from the water's edge; the backshore. 

seaside

noun
  • The area by and around the sea; including the beach, promenade or cliffs 

adj
  • Related to a seaside. 

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