What does apportion mean?
The definition of apportion
Ap*por”tion, v. t.
[imp. & p. p. Apportioned; p. pr. & vb. n.Apportioning.]
Etym: [OF. apportionner, LL. apportionare, fr. L. ad + portio. See Portion.]

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.