ebullience vs ineptitude

ebullience

noun
  • A boiling or bubbling up; an ebullition. 

  • The quality of enthusiastic or lively expression of feelings and thoughts. 

ineptitude

noun
  • An instance of being inept. 

  • The quality of being inept. 

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