ascendant vs elderdom

ascendant

noun
  • Being in control; superiority, or commanding influence; ascendancy. 

  • An ancestor. 

  • A royal heir assuming (a place of power). 

  • The horoscope, or that degree of the ecliptic which rises above the horizon at the moment of one's birth; supposed to have a commanding influence on a person's life and fortune. 

  • Ascent; height; elevation. 

adj
  • Surpassing or controlling. 

  • Rising, moving upward. 

elderdom

noun
  • Preeminence; superiority. 

  • The role or influence of an elder or elders. 

  • The authority, rule, or office of an elder. 

  • The state of being an elder, or of being older; elderhood. 

  • Authority; dominion. 

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