infanticide vs martyrdom

infanticide

noun
  • The murder of a child by a parent; filicide. 

  • The murderer of a child: a person who has committed infanticide. 

  • The murder of an infant. 

  • The criminal offence of killing of a newborn, committed by its mother while psychologically disturbed by the effects of childbirth or lactation, not regarded as murder. 

  • The killing of a young, immature animal by a mature adult of the same species. 

martyrdom

noun
  • The condition of a martyr; the death of a martyr; the suffering of death on account of adherence to the Christian faith, or to any cause. 

  • Extreme suffering, affliction; torment; torture, especially without reason. 

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