astragalus vs shinbone

astragalus

noun
  • The anklebone. 

  • A herb of the genus Astragalus. 

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. 

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