This is the 54th most frequent Slovenian word.
času
"Času" means "of time" (genitive singular of "čas").
The word 'časa' is used here in the genitive case to signify 'of time,' indicating a quantity or a lack thereof.
Med šolskim letom nimam veliko prostega časa.
During the school year, I don’t have much free time.
The word 'času' is used in the locative case, denoting 'during this time' or 'in this time period.'
V tem času so se zgodile mnoge spremembe.
During this time, many changes occurred.
The word 'časa' appears again in the genitive case, correlated to the expression of a greater quantity needed of 'time.'