Which preposition to use with providers

of Occurrences 12%

We have the hawkkeepers, and the bowkeepers; the providers of the king's carriages, and his standard-bearers.

for Occurrences 7%

Nevertheless, the Government is the sole provider for the army, and assumes the main responsibility of the physical condition of its members.

at Occurrences 1%

These verses, which have not before been collected with Lamb's writings, exist in an album which belonged probably to Thomas Westwood, son of the Lambs' providers at Enfield.

Which preposition to use with  providers