prepotency vs self-government

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. 

self-government

noun
  • The governance of a region by its own populace; autonomy. 

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