During indicates a period or range of time (having duration) and is used to say that something happened. "throughout this time" or "sometime within this time". A clause with during focuses more on what happened—the activity, event or experience.

Where do we use during during?

We use during to talk about when something happens in relation to another event which lasts for a period of time. We use a noun after during. Note: we do not use during to talk about the length of time or the start or end point of the event. I went skiing several times during the winter.

How do you use a period in a sentence?

Sentence examples for during this period from inspiring English sources. I met Lucas during this period. Portraiture made dramatic progress during this period. Makiguchi died in detention during this period.