stillbirth vs stillborn

stillbirth

noun
  • The birth of a dead fetus after 20 weeks of gestation. 

  • The birth of a dead fetus; the delivery of an infant which is dead at birth. 

stillborn

noun
  • A baby that is born dead. 

adj
  • Dead at birth. 

  • Ignored, without influence, or unsuccessful from the outset; abortive. 

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