affluence vs plenitude

affluence

noun
  • An abundance of wealth. 

  • An influx. 

  • A moderate level of wealth. 

plenitude

noun
  • An abundance; a full supply. 

  • Fullness (of the moon). 

  • The metaphysical idea that the universe contains everything that is possible. 

  • Fullness; completeness. 

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