easiness vs vicissitude

easiness

noun
  • Looseness or pliancy, often derogatory 

  • Freedom from inhibition and awkwardness: grace. 

  • Lack of harshness: gentleness, kindness. 

  • Freedom from discomfort and worry: comfort. 

  • Lack of concern or care: carelessness, indolence. 

  • Lack of difficulty; quality of not being frustrating, difficult, or dense (compact). 

  • Lack of firm conviction: gullibility, credulity. 

  • Lack of difficulty or trouble: facility; simplicity. 

vicissitude

noun
  • Regular change or succession from one thing to another, or one part of a cycle to the next; alternation; mutual succession; interchange. 

  • A change, especially in one's life or fortunes. 

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