WORK PERIOD is a term used to describe the amount of time an employee spends working. A STINT is a period of work, usually of short duration, that is done by an employee. A SHIFT is a period of time during which a worker is at their place of employment. A DAY is a 24-hour period of time. An HOURWEEK is a unit of time equal to seven days or 168 hours. Together, these terms describe the amount of time an employee spends working in a given period.