ascendancy vs authority

ascendancy

noun
  • Supremacy; dominant control; the quality of being in the ascendant. 

  • A class of Protestant landowners and professionals that dominated political and social life in Ireland up to the early 20th century 

  • A quantitative attribute of an ecosystem, defined as a function of the ecosystem's trophic network, and intended to indicate its ability to prevail against disturbance by virtue of its combined organization and size. 

authority

noun
  • Power or right to make or enforce rules or give orders; or a position having such power or right. 

  • A reliable, definitive source of information on a subject. 

  • Persons, regarded collectively, who occupy official positions of power; police or law enforcement. 

  • Official permission; authorisation to act in some capacity on behalf of a ruling entity. 

  • A government-owned agency that runs a revenue-generating activity for public benefit. 

  • Status as a trustworthy source of information, reputation for mastery or expertise; or claim to such status or reputation. 

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