Niflheim vs fire and brimstone

Niflheim

name
  • In Germanic and Norse cosmology, the Norse underworld, location of the domain Hel and of the realm of Hel, the goddess of the dead. 

fire and brimstone

noun
  • The traditional punishments of Hell. 

adj
  • Referencing or emphasizing the power and wrath of God. 

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