preposition
during
DUR-ing/ˈdʊrɪŋ/
Throughout or at some point within a period of time.
The reader continues reading indoors during the rain outside.

Etymology
During began as a participle meaning “lasting” or “enduring.” A phrase such as “during the day” thus meant “while the day endures,” explaining its use to locate something within a period.
In context
Located in the village of Jelling, the stones were erected in the 10th century during a period of rapid transformation across Scandinavia.
More examples
- She called during my lunch break.
- We stayed quiet during the performance.
- The road closed several times during the winter.
Forms
during
Similar words
- throughout
- Specifically means across the whole period, not just part.
- in
- Can locate an event within a period without emphasizing duration.