mountain pass vs versant

mountain pass

noun
  • A low point in a mountain range that allows travelers to cross the range. 

versant

noun
  • a slope of a mountain or mountain ridge 

  • the overall slope of a region 

adj
  • conversant 

  • With the wings erect and open. 

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