awkwardness vs indeclinability

awkwardness

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

  • The quality of an embarrassing situation. 

indeclinability

noun
  • The quality of being indeclinable. 

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