co-father vs daddy

co-father

noun
  • In a male homosexual couple, the nonbiological father (partner of the biological father) of a child. 

daddy

noun
  • A dominant male partner, often used as an address. 

  • A perfect example, a role model. 

  • A male lover. 

  • Father. 

  • A male juvenile delinquent in a reformatory who dominates the other inmates through threats and violence. 

verb
  • To father; to sire. 

adj
  • Resembling or characteristic of a dad. 

How often have the words co-father and daddy occurred in a corpus of books? (source: Google Ngram Viewer )