Nietzsche stood at the beginning of his most productive period.

The 1760s were probably the most productive period of the artist.

This was a particularly productive and happy period in Roberts' life.

Her most productive period as a poet was the later 1920s.

He continued to work from home in what became a highly productive period.

The years spent in the city were the most productive period of his life.

This was the most wildly productive period of his career.

Here he entered on the great productive period of his career.

Rain asked whether it had been an especially productive period.

In artistic terms, the 12th century was a very productive period.