elderdom vs prepotency

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. 

prepotency

noun
  • The quality or condition of being prepotent; predominance. 

  • The capacity, on the part of one of the parents, as compared with the other, to transmit more than his or her own share of characteristics to their offspring. 

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