ascent vs upthrow

ascent

noun
  • The act of ascending; a motion upwards. 

  • An increase, for example in popularity or hierarchy 

  • The ascender height in a typeface. 

  • The degree of elevation of an object, or the angle it makes with a horizontal line; inclination; gradient; steepness 

  • The way or means by which one ascends. 

  • An eminence, hill, or high place. 

upthrow

noun
  • A fault in which a mass of material has been thrown up from below. 

verb
  • To be thrown up from below, causing a fault. 

  • To throw up (a mass of material) from below, causing a fault. 

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