This is the 1307th most frequent Russian word.
скором
"Скором" means "soon" or "in the near future" in English.
Here, 'в скором времени' acts as an adverbial phrase meaning 'soon' or 'in the near future'.
Мы встретимся в скором времени.
We will meet in the near future.
In this sentence, 'на скором поезде' demonstrates the adjective usage meaning 'fast' or 'express' when describing a type of train.
На скором поезде мы доедем быстрее.
By a fast train, we will arrive sooner.
Here, 'скорому' is in the dative case and is used to describe a quality ('diligence' in this case) that refers to occasional or rare occurrences.