birdcage vs chicken coop

birdcage

noun
  • A cage to keep pet or zoological specimen birds in. 

  • A game of chance played with dice; chuck-a-luck. 

chicken coop

noun
  • A building, often wooden with wire netting, in which a small number of poultry are kept. 

  • A weigh station. 

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