iniquity vs obtrusion

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. 

obtrusion

noun
  • An encroachment beyond proper limits. 

  • An interference or intrusion. 

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