midwife vs nurserymaid

midwife

noun
  • A person, usually a woman, who is trained to assist women in childbirth, but who is not a physician. 

  • Someone who assists in bringing about some result or project. 

verb
  • To facilitate the emergence of. 

  • To act as a midwife. 

nurserymaid

noun
  • nursemaid 

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