expression
waiting one's turn; waiting in line
Common noun-like expression for the act of waiting for one's turn, often used in contexts like queues, reservations, or service order.
人気のラーメン店の前には、いつも順番待ちの列ができている。
There is always a line of people waiting their turn in front of the popular ramen shop.
順番待ちの時間を利用して、スマホでニュースを読んだ。
I used the waiting time to read the news on my smartphone.
待ち時間 is the duration of waiting, whereas 順番待ち is the state or action of waiting for a turn.
Compound of 順番 (turn, order) and 待ち (waiting), the continuative form of 待つ (to wait).