This is the 3033rd most frequent Korean word.
한달
One month.
The word '한달' is used to indicate a time duration, specifically one month.
나는 한달 동안 여행을 다녀왔어요.
I went on a trip for one month.
Here, '한달' is used to specify the length of time required to accomplish an activity.
이 프로젝트를 완료하는 데 한달이 걸릴 것이다.
It will take one month to complete this project.
In this sentence, '한달 만에' suggests the amount of time that passed before an event occurred.