arduity vs awkwardness

arduity

noun
  • The state or quality of being arduous; steepness, difficulty. 

awkwardness

noun
  • The state or quality of being awkward; clumsiness; unskillfulness. 

  • The quality of an embarrassing situation. 

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