scarp vs upslope

scarp

noun

  • The steep artificial slope below a fort's parapet. 

  • A cliff at the edge of a plateau or ridge caused by erosion or faulting; the steeper side of an escarpment. 

verb

  • to cut, scrape, erode, or otherwise make into a scarp or escarpment 

upslope

noun

  • an upward slope 

adj

  • in a direction up a slope 

adv

  • up a slope 

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