crevasse vs rift

crevasse

noun
  • Any cleft or fissure. 

  • A discontinuity or “gap” between the accounted variables and an observed outcome. 

  • A crack or fissure in a glacier or snowfield; a chasm. 

  • A breach in a canal or river bank. 

verb
  • To fissure with crevasses. 

  • To form crevasses. 

rift

noun
  • A chasm or fissure. 

  • A break in the clouds, fog, mist etc., which allows light through. 

  • A shallow place in a stream; a ford. 

verb
  • To form a rift; to split open. 

  • To belch. 

  • To cleave; to rive; to split. 

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