changeableness vs zeal

changeableness

noun
  • the condition of being able to suffer some changes 

  • the condition of being changeable 

zeal

noun
  • The fervour or tireless devotion for a person, cause, or ideal and determination in its furtherance; diligent enthusiasm; powerful interest. 

  • The collective noun for a group of zebras. 

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