stint

task, duty, job, chore, stint, assignment mean a piece of work to be done.

task implies work imposed by a person in authority or an employer or by circumstance.

duty implies an obligation to perform or responsibility for performance.

job applies to a piece of work voluntarily performed; it may sometimes suggest difficulty or importance.

chore implies a minor routine activity necessary for maintaining a household or farm.

stint implies a carefully allotted or measured quantity of assigned work or service.

assignment implies a definite limited task assigned by one in authority.