beach chair vs sunlounger

beach chair

noun
  • A special chair designed to provide comfort and protection from sun, wind, rain, and sand on beaches frequented by tourists. 

sunlounger

noun
  • A form of extended deckchair used for sunbathing or relaxing (typically by the sea or a pool) 

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