shinbone vs trouser leg

shinbone

noun
  • The inner and usually the larger of the two bones of the leg or hind limb below the knee 

  • A segment of an insect's leg. 

trouser leg

noun
  • Either of the legs of a pair of trousers 

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