socage

noun1

1. •
   (historical) In the Middle Ages (and chiefly but not exclusively medieval England), a legal system whereby a tenant would pay a rent or do some agricultural work for the landlord.

   • The rest was held by tenants, sometimes called "sokemen" from the "soke" or jurisdiction; and said to hold in "soccage" because they gave plough-service by way of rent. — 1908