This is the 606th most frequent Slovenian word.
hrvaške
"Hrvaške" means "Croatia" in the genitive or accusative case in Slovenian.
Here, 'Hrvaško' is the accusative case of 'Hrvaška', used as the object of the sentence indicating the destination of travel.
Odpotovali smo na Hrvaško za poletne počitnice.
We traveled to Croatia for the summer holidays.
In this context, 'Hrvaške' is the genitive case of 'Hrvaška', used to show possession or a connection to 'zgodovino' (history), indicating 'the history of Croatia'.
Zanimam se za zgodovino Hrvaške.
I am interested in the history of Croatia.
Here, 'Hrvaške' is an adjective form meaning 'Croatian', used to describe the noun 'plaže' (beaches).