false step vs stillbirth

false step

noun
  • An erroneous action or decision. 

  • A misstep; a stumble. 

stillbirth

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

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

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