incline vs scree

incline

verb
  • To slope. 

  • To bend or move (something) out of a given plane or direction, often the horizontal or vertical. 

  • To tend to do or believe something, or move or be moved in a certain direction, away from a point of view, attitude, etc. 

noun
  • A portal of a subway tunnel. 

  • A slope. 

scree

verb
  • To traverse scree downhill. 

  • To flatten or level concrete while still wet, and remove protruding gravel and stones from the surface. 

  • To make a high-pitched cry like that of a hawk. 

noun
  • Similar debris made up of broken building material such as bricks, concrete, etc. 

  • Loose stony debris on a slope. 

  • A coarse sieve. 

  • A harsh, high-pitched sound or cry (as of a hawk). 

  • A slope made up of loose stony debris at the base of a cliff, mountain, etc. 

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