Pa vs daughter

Pa

noun
  • A short form of grandpa; grandfather. 

  • Father, dad, papa. 

daughter

noun
  • A daughter language. 

  • One’s female offspring. 

  • A nuclide left over from radioactive decay. 

  • A female character of a creator. 

  • A female descendant. 

  • A descendant. 

  • A familiar address to a female person from an older or otherwise more authoritative person. 

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