Avernus vs fire and brimstone

Avernus

name

  • A lake in Southern Italy. 

  • The entrance to Hell or the underworld, or the underworld itself. 

fire and brimstone

adj

  • Referencing or emphasizing the power and wrath of God. 

noun

  • The traditional punishments of Hell. 

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