paramountcy vs prepotency

paramountcy

noun
  • The fact or condition of being paramount; supremacy, precedence. 

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 paramountcy and prepotency occurred in a corpus of books? (source: Google Ngram Viewer )