plan vs. schedule
Quick Glossary (用語辞典)
timetable = 時刻表
noun = 名詞
verb = 動詞
certain = 一定の
plural = 複数の
detailed = 詳細な
Explanation (説明)& Examples (例文)
The confusion between these two words seems to be partly due to translation: the Japanese word yotei (予定)can be translated into English as either plan or schedule.
In English, schedule usually refers to a list of things to do.
Genji wanted to start taking guitar lessons, but he couldn't fit them into his schedule--he is already very busy with his studies, his part-time job, and various school club activities.
I've got a busy schedule this week: a trip to Tokyo on Tuesday, meetings in Nagoya all day Wednesday and Thursday, and a presentation at a conference in Yokohama on Friday.
Schedule is also used as a verb.
I've scheduled three interviews for next Monday afternoon.
When you want to say that you are busy or that you have something else to do at a certain time or on a certain day, it is more natural to use the word plans (in the plural form).
Naomi: Kenji, how would you like to see a movie tomorrow?
Kenji: I'd love to, but I already have plans--I'm meeting an old friend. How about this Saturday?
Naomi: That sounds good. Give me a call on Friday so we can decide where to meet.
Plans (ending in "s") is used very generally to talk about something you have already decided to do. The word plan, however, is usually used to describe how or when you will do something. It can be used as a noun or a verb.
Before we start this project, we need a detailed plan that shows how long it will take and how much it will cost. (noun)
Don't worry about the presentation materials--I plan to have them ready by early this afternoon. (verb)
Exercises(練習)Plan, plans or schedule?