Related Clues:

• Boxes of calendars?
• Periods of time
• Hitch
• Be frugal
• Tour of duty
• Job to do
• Pinch pennies
• Period of duty
• See 11-Across
• Times
• During working hours
• Lifetime
• Time spent on the job
• Be sparing
• Word with 'Happy' and 'Death Valley' in old TV titles