Which preposition to use with spoonsful

of Occurrences 15%

That her father, the magician Locuste, ever sedulous and affectionate, fed her with spoonsful of the honeyed froth that gathers under the tongues of asps?

at Occurrences 1%

I once ate about three spoonsful at table at Mr. Timothy Brown's, at Peckham, which had been cooked, I suppose, in the usual way; but I had not long eaten them before my whole body, face, hands, and all, was covered with red spots or pimples, and to such a degree, and coming on so fast, that the doctor who attended the family was sent for.

Which preposition to use with  spoonsful