breech vs caboose

breech

noun
  • A garment whose purpose is to cover or clothe the buttocks. 

  • The part of a cannon or other firearm behind the chamber. 

  • A breech birth. 

  • The external angle of knee timber, the inside of which is called the throat. 

adj
  • Born, or having been born, breech. 

verb
  • To fit or furnish with a breech. 

  • To fasten with breeching. 

adv
  • With the hips coming out before the head. 

caboose

noun
  • buttocks 

  • The person or team in last place. 

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

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

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

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