Which preposition to use with redemptioners

in Occurrences 2%

Negro slaves were also imported to work alongside the redemptioners in the tobacco, cotton, ginger, and indigo crops, and soon proved their superiority in that climate, especially when yellow fever, to which the Africans are largely immune, decimated the white population.

for Occurrences 1%

The same year he "received from on board the Brig Anna, from Ireland, two servant men for whom I agreed yesterdayvizThomas Ryan, a shoemaker, and Cavan Bowen a Tayler Redemptioners for 3 years service by Indenture."

Which preposition to use with  redemptioners