Apportion v. t. (past & past part. apportioned; pres. part. apportioning) To divide and assign in just proportion; to divide and distribute proportionally; to portion out; to allot; as, to apportion undivided rights; to apportion time among various employments.
... importation of slaves; but this amendment [i.e., to count two slaves as one freeman] would give the jus trium liberorum to him who would import slaves."[35] The matter was finally compromised by apportioning requisitions according to the value of ... — The Suppression of the African Slave Trade to the United States of America - 1638-1870 • W. E. B. Du Bois