In the course of his 60-year career, the 1930s were a particularly productive and experimental time.

Spring would be the most productive time for this zone.

It was definitely the most productive time of my life.

"It probably won't be the most productive time here this week."

And what a gain in productive time, working five minutes away from home.

It's not just a matter of "10 times more productive."

The artist lived here during his last 15 years, which proved to be a productive time for him.

His research identified 31 years old as the most productive time in a defensive end's career.

As such, it affects the most productive times of our lives.

It was a productive, creative time for all of them.