frivolousness

frivolous +‎ -ness

frivolousness (countable and uncountable, plural frivolousnesses)

1. (uncountable) The quality of being frivolous.
   • 2016, Zadie Smith, Swing Time, New York, N.Y.: Penguin Press, →ISBN, page 150:

     I felt, as usual, my own smallness next to her, the scale of what she had achieved, the frivolousness of my own occupation in comparison, despite all she’d tried to direct me towards.

2. (countable) The result of being frivolous.

• frivolity
• frivolosity