This is the 48th most frequent Czech word.
během
"During" or "in the course of."
Here, 'během' is used to express a time frame, meaning 'during'.
Během prázdnin jsme navštívili Český ráj.
During the holidays, we visited the Bohemian Paradise.
In this sentence, 'během' indicates a time period within which an event occurred.
Došlo ke změnám během schůze.
Changes happened during the meeting.
The word 'během' is used to denote the duration of an event described.