More than a few had probably worked as one or both during the course of their lives.

Because she sometimes worked during the day and at night, I often had to stay home alone.

All seven of his children worked in the business at some time during their lives.

He worked during the day and took care of our baby at night.

He used to work during the day and study at night.

They also work three days a month during the school year.

You should maybe even be working a night or two during the week at the market.

I worked upon the matter during all the time you were talking to her.

My two friends work during the day, so I come at night.

He was working hard during the day, and living a full social life at night.