joyness vs lightheartedness

joyness

noun
  • The state or condition of joy; joyfulness. 

lightheartedness

noun
  • The state of being lighthearted, joyous, cheerful, without a care. 

  • An amusement or item of a pleasant but inconsequential nature. 

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