godmother vs midwife

godmother

noun
  • A woman present at the christening of a baby who promises to help raise the child in a Christian manner; a female godparent who sponsors the baptism of a child. 

verb
  • To act as godmother to. 

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. 

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