Portion
Part of speech: noun
Definition: An allocated amount.
Part of speech: verb
Definition: To divide into amounts, as for allocation to specific purposes.
Example sentence: Few will have the greatness to bend history itself; but each of us can work to change a small portion of events, and in the total; of all those acts will be written the history of this generation.
Assign
Part of speech: noun
Definition: An assignee.
Part of speech: verb
Definition: To designate or set apart something for some purpose.To appoint or select someone for some office.To allot or give something as a task.To attribute or sort something into categories.To transfer property, a legal right, etc., from one person to another.