Americans refer to university as college. But UK, college is not university. college is the little bit in between high school and university. They have a wide range of topics they can choose from. Students can focus as much time as they want onto each of those subjects.

refer ﾘ フｧｰｧ　v)物事の帰属を当てはめる、であると考える･見なす

as much  量【連帯名詞と考える】 as much time as they want to

focus v)集中する　focus on    n)焦点

onto  上に向かって動いているイメージ

日本の専門学校について

Students can focus as much time as they want onto one subject after graduating from high school.