mauma vs old lady

mauma

noun
  • mother 

  • A title of respect for an elderly woman 

old lady

noun
  • One's mother. 

  • The Bank of England, sometimes referred to as the “Old Lady of Threadneedle Street” or simply “The Old Lady”. 

  • A queen. 

  • An elderly woman. 

  • One's girlfriend, wife or significant other. 

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