This is the 1864th most frequent Korean word.
계획이
"계획이" means "a plan" or "plans" in English.
계획이 is used here as a subject to indicate the existence of a plan.
저는 내일의 여행 계획이 있어요.
I have a plan for tomorrow's trip.
계획이 is used as the subject of the sentence indicating the current status of a plan.
계획이 잘 진행되고 있습니다.
The plan is progressing well.
계획이 is used as the subject to describe the characteristics of his plan.