This is the 715th most frequent Slovenian word.
srbiji
"Srbiji" is the dative or locative case of "Srbija," meaning "to Serbia" or "in Serbia" in English.
In this sentence, 'v Srbiji' indicates a location, specifying Serbia where the action of living took place.
Nekaj let sem preživel v Srbiji.
I spent a few years in Serbia.
'v Srbiji' is used to indicate the origin or ancestral background relating to Serbia.
Moja družina ima korenine v Srbiji.
My family has roots in Serbia.
Here, 'v Srbiji' sets the geographical context for the statement about people's behavior.