fire and brimstone vs purgatory

fire and brimstone

noun
  • The traditional punishments of Hell. 

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

purgatory

noun
  • Any situation where suffering is endured, particularly as part of a process of redemption. 

adj
  • Tending to cleanse; expiatory. 

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