talus vs tor

talus

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

  • The bone of the ankle. 

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

tor

noun
  • A hill with such rock formation. 

  • A craggy outcrop of rock on the summit of a hill, created by the erosion and weathering of rock. 

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