chook vs knit cap

chook

noun
  • A cooked chicken; a chicken dressed for cooking. 

  • A chicken, especially a hen. 

intj
  • A call made to chickens. 

  • An imitation of the call of a chicken. 

knit cap

noun
  • A soft, head-hugging cap usually without a specified front or back, barring those with designs or logos 

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