If, for example, there are two days of contact teaching every other week during the next 1.5 years and two months of on-the-job training, will the student apply for a study leave for the entire 1.5 year period or separately for each time period as needed?

If the total duration of the studies is 1.5 years, apply for study leave for this entire period. On the basis of the application, study leave can be granted and used in one or more periods, for example, by giving one or several whole days of leave at specified times.