caboose vs cooking pot

caboose

noun
  • A small sand-filled container used as an oven on board ship. 

  • The person or team in last place. 

  • A youngest child who is born after a long gap in time. 

  • The last car on a freight train, having cooking and sleeping facilities for the crew; a guard’s van. 

  • buttocks 

cooking pot

noun
  • Any vessel (such as a saucepan), with or without a lid, used to cook food 

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