baby of the family vs nursemaid

baby of the family

noun
  • An adult member of an immediate family who is treated by others in the family, especially the parents, as though they were a child. 

  • The youngest member of an immediate family. 

  • A member of an immediate family who behaves as, or is treated as though they were the youngest member of a family. 

nursemaid

noun
  • A woman or girl employed to care for children. 

verb
  • To care for or look after. 

  • To tend to as a nursemaid. 

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