savagery vs severity

savagery

noun
  • A violent act of cruelty. 

  • Wild growth of plants. 

  • Savage or brutal behaviour; barbarity. 

  • Savages collectively; the world of savages. 

severity

noun
  • The state of being severe. 

  • The degree of something undesirable; badness or seriousness. 

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