Which preposition to use with carefree

as Occurrences 1%

Gay booths and kiosks skirt the Esplanade, where vendors are kept busy supplying their wares and where everyone appears as carefree as the gulls wheeling above the white breakers.

of Occurrences 1%

This smooth-shaven lad, so easy and carefree of manner, had a gleam in his eye that meant business.

Which preposition to use with  carefree