lying-in vs rebirth

lying-in

noun
  • The final stages of pregnancy; accouchement. 

  • A period of postpartum confinement, typically a month or longer, formerly common in Europe and still practiced in some parts of the world. 

adj
  • of, or relating to childbirth or postpartum confinement 

rebirth

noun
  • Reincarnation; new birth subsequent to one's first. 

  • Revival, reinvigoration. 

  • Spiritual renewal. 

verb
  • To cause to be born again or spiritually renewed. 

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