ascension vs ascent

ascension

noun
  • The act of ascending; an ascent. 

  • A transcendence of the material world; a transition to a higher form, state, or plane of existence. 

  • That which rises, as from distillation. 

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. 

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