This is the 14387th most frequent Russian word.
отправление
"Отправление" - departure, dispatch, or sending.
Here, 'отправление' refers to the act of departing, specifically the scheduled moment when a train leaves a station.
Отправление поезда запланировано на 15:30.
The departure of the train is scheduled for 3:30 PM.
In this sentence, 'отправление' conveys the act of departure in a general sense, used in a preparatory context.
Перед отправлением проверьте наличие всех документов.
Before departure, check the presence of all documents.
Here, 'отправление' describes the act of sending, specifically referring to the act of dispatching a letter.