This is the 165th most frequent Japanese word.
場合
"場合" means "case," "situation," or "circumstance."
Here '場合' (bāi) is used to refer to a specific situation or circumstances.
雨の場合はイベントが中止されます。
In the case of rain, the event will be canceled.
'場合' is used to indicate a conditional situation where informing in advance is requested.
遅刻する場合は早めに知らせてください。
If you are going to be late, please inform us in advance.
'場合' here signifies a hypothetical condition requiring a specific action if it arises.