astragalus vs talus

astragalus

noun
  • The anklebone. 

  • A herb of the genus Astragalus. 

talus

noun
  • The bone of the ankle. 

  • A sloping heap of fragments of rock lying at the foot of a precipice. 

  • The slope of an embankment wall, which is thicker at the bottom than at the top. 

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