연박 (yeonbak) means “multi-night stay”

More examples

출장이라 연박으로 묵으니 이동이 편했어요.chul jang i ra yeon ba geu ro mu geu ni i dong i pyeon hae sseo yo

Since it was a business trip, staying for multiple nights made it convenient to get around.

Several nights connect into one uninterrupted stay at the same lodging.

숙박sukppak: Spending the night at a place while traveling or away from home.
투숙tusuk: Using a hotel or inn room for a period of time.

같은 숙소에서 며칠 연달아 머무르며 숙박하는 것을 가리키는 말ka teun suk sso e seo myeo chil yeon da ra meo mu reu myeo suk ppa ka neun keo seul ka ri ki neun mal

As a Sino-Korean compound, the word combines the ideas of continuity and staying overnight to describe lodging for several nights in a row.

A booking for several nights can be handled differently from several one-night bookings, so recognizing this term helps when reading hotel policies.