decency vs iniquity

decency

noun
  • That which is proper or becoming. 

  • The quality of being decent; propriety. 

iniquity

noun
  • An act of great injustice or unfairness; a sinful or wicked act; an unconscionable deed. 

  • Deviation from what is right; gross injustice, sin, wickedness. 

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