ill-doing vs iniquity

ill-doing

noun
  • A wicked act or behavior, especially a crime. 

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 ill-doing and iniquity occurred in a corpus of books? (source: Google Ngram Viewer )