This is the 11031st most frequent Korean word.
기간동안
"During the period" or "for the duration."
In this sentence, '동안' is used after '열흘,' a duration of ten days, to indicate the length of time for discussing the issue.
열흘 동안 그 문제를 논의했습니다.
We discussed the issue for ten days.
Usage of '동안' here indicates the specific period (summer) during which the action of carrying out the project takes place.
이 프로젝트는 여름 동안 진행될 것입니다.
This project will be carried out during the summer.
Here, '기간동안' combines '기간' (period) and '동안' (duration) to specify the time frame (exam period) during which loan services are restricted.