ancilla vs matron

ancilla

noun
  • A maid. 

  • An auxiliary or accessory 

matron

noun
  • A housekeeper, especially, a woman who manages the domestic economy of a public institution. 

  • A mature or elderly woman. 

  • A woman of staid or motherly manners. 

  • A wife or a widow, especially, one who has borne children. 

  • A senior female nurse in an establishment, especially a hospital or school. 

  • A female prison officer. 

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