Which preposition to use with collop

of Occurrences 3%

Twenty miles from the pulpería he draws rein, dismounts, wipes his bloody knife on the grass, and slices off a collop of charque, which he munches composedly for his supper.

for Occurrences 1%

(4to): men. 'Carbonardoed'cut into collops for grilling: a common expression.

Which preposition to use with  collop