Which preposition to use with yammering

over Occurrences 1%

Entering the yard, we found the wooden sheds crowded with people at breakfastall ages, from white-haired men, bent with years, to eager childhood, yammering over its morning meal, and careless till the next nip of hunger came.

of Occurrences 1%

Long ago, one night in Korea, he had been wakened by the yammering of a tigress.

Which preposition to use with  yammering