Different school has its own teaching plans and the standard of the "Korean - elementary level course" is also different. So, it is difficult to say.
But if you are talking about the standard of elementary level for TOPIK (level 1 & 2), it normally takes half year full time course in Korean Universities.
And in HK Chinese University it takes about 2 years part time study and more if it is by 工聯會.
For completing High level (level 6) in Korean Universities, it takes another 1 year full time course in addition to the elementary course.
There is no comparable course, High level (level 6) offered in HK.