chilly bin vs icehouse

chilly bin

noun
  • an insulated picnic cooler, using refrigerated blocks to keep food cool. 

icehouse

noun
  • A deep cellar or outdoor building used for the storage of ice or snow; sometimes also used to store food at low temperature. 

  • An ice hockey rink. 

  • A cold state in global climate. 

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