esky vs fridge

esky

noun
  • An insulated picnic cooler, using ice or refrigerated blocks to keep food and drinks cool. 

fridge

noun
  • A refrigerator. 

verb
  • To place (something) inside a refrigerator to chill; to refrigerate. 

  • To gratuitously kill, disempower, or otherwise remove (a character, usually female) from a narrative, often strictly to hurt another character (usually male) and motivate vengeance. 

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