an hero vs self-blood

an hero

noun
  • A suicidee; one who commits suicide. 

verb
  • To commit suicide. 

self-blood

noun
  • The shedding of one's own blood; self-slaughter; suicide. 

  • One's direct progeny or offspring. 

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