lack vs opulence

lack

verb
  • To be short (of or for something). 

  • To be without, not to have, to need, to require. 

noun
  • A deficiency or need (of something desirable or necessary); an absence, want. 

opulence

noun
  • wealth 

  • abundance, bounty, profusion 

  • ostentatious display of wealth and luxury; plushness. 

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