Nemesis vs Purity

Nemesis

name
  • The goddess of divine retribution. 

  • 128 Nemesis, a main belt asteroid. 

  • A hypothetical star postulated to be orbiting the Sun to explain a perceived cycle of mass extinctions in the geological record. 

Purity

name
  • A female given name from English from the virtue purity. 

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