charnel vs self-killing

charnel

noun
  • A repository for dead bodies. 

  • Part of a helm, now usually identified as the hinge (near the neck) by which the helm was secured to the breastplate. 

  • A chapel attached to a mortuary. 

adj
  • Of or relating to a charnel, deathlike, sepulchral. 

self-killing

noun
  • The killing of oneself; suicide. 

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