Difference between Insouciance and Carefreeness

What is the difference between Insouciance and Carefreeness?

Insouciance as a noun is careless, heedless, indifferent, or casual unconcern while Carefreeness as a noun is the property of being lighthearted, joyous, cheerful, without a care.

We hope you now know whether to use Insouciance or Carefreeness in your sentence.