Which preposition to use with chupa

of Occurrences 2%

Those engaged in severe labor consume at each meal a chupa of rice; the common people, half a chupa at breakfast, one at mid-day, and half again in the evening, altogether two chupas.

at Occurrences 1%

Those engaged in severe labor consume at each meal a chupa of rice; the common people, half a chupa at breakfast, one at mid-day, and half again in the evening, altogether two chupas.

for Occurrences 1%

The average retail price is 3 cuartos for 2 chupas (14 chupas for 1 real).

Which preposition to use with  chupa