depravity vs leching

depravity

noun
  • Inborn corruption, entailing the belief that every facet of human nature has been polluted, defiled, and contaminated by sin. 

  • The state or condition of being depraved; moral debasement. 

  • A particular depraved act or trait. 

leching

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