daughter vs viscountess

daughter

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

  • 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. 

viscountess

noun
  • A woman holding the rank of viscount in her own right. 

  • The wife of a viscount. 

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