Which preposition to use with contadini

of Occurrences 2%

The pifferari are generally contadini of the Abruzzi Mountains, who, at the season of Advent, leave their home to make a pilgrimage to Rome, stopping before all the wayside shrines, as they journey along, to pay their glad music of welcome to the Virgin, and the coming Messiah.

on Occurrences 1%

The contadini on the little farm which I came to possess before I left Tuscany cultivated it precisely after the fashion of their grandfathers and great-grandfathers, and strenuously resisted any suggestion that it could, should, or might be cultivated in any other way.

Which preposition to use with  contadini