colorfulness vs lightheartedness

colorfulness

noun
  • The state of being colorful. 

  • The perceived intensity of a specific color. 

lightheartedness

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

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

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