This is the 2226th most frequent Russian word.
длительное
"Длительное" means "prolonged" or "long-lasting."
In this sentence, "длительный" is used as an attribute describing 'leave' (отпуск), implying its prolonged duration.
Он решил взять длительный отпуск на работе.
He decided to take an extended leave from work.
Here, "длительное" describes 'waiting' (ожидание) and emphasizes its extended time span.
Длительное ожидание вызвало раздражение среди зрителей.
The prolonged waiting caused irritation among the audience.
In this sentence, "длительное" refers to 'time' (время), highlighting the considerable duration needed to accomplish the task.