This is the 374th most frequent Serbian word.
књижевности
The Serbian word "књижевности" means "literature" in English.
The word 'књижевности' is in the genitive case, indicating a relationship of possession or association with 'History'.
Историја књижевности проучава различите књижевне епохе.
The history of literature studies different literary epochs.
Here, 'књижевности' is again in the genitive case, used to define the type of theory discussed.
Он је стручњак за теорију књижевности.
He is an expert in the theory of literature.
In this context, 'књижевности' is in the dative case, as part of the prepositional phrase indicating the recipient of contribution.