feticide vs stillbirth

feticide

noun
  • The killing of a fetus or embryo; an induced abortion. 

  • One who kills a fetus. 

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. 

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