mammy vs mumsy

mammy

noun
  • mamma; mother 

  • In the southern United States, a black nanny employed to look after white children; or in the antebellum South, a female slave who was close to the household and looked after the children. 

mumsy

noun
  • Mum, mother. 

adj
  • Characteristic of a mum; motherly. 

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