lenient vs overweening

lenient

noun

  • A lenitive; an emollient. 

adj

  • Lax; not strict; tolerant of dissent or deviation 

overweening

adj

  • Unduly confident; arrogant 

  • Exaggerated, excessive. 

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