Which preposition to use with engrosser

of Occurrences 3%

But although Robin laughed at the droll sight, he knew the wayfarer to be a certain rich corn engrosser of Worksop, who more than once had bought all the grain in the countryside and held it till it reached even famine prices, thus making much money from the needs of poor people, and for this he was hated far and near by everyone that knew aught of him.

in Occurrences 1%

" "Doss thou prate so to me, sirrah?" cried the Corn Engrosser in a rage.

Which preposition to use with  engrosser