Just wondering if the schools count an hour as an hour or an hour as 45 minutes in some cases?

Oh and any school allow you to do 4 classes spread over 4 days a week?

In most countries, including Thailand, an academic hour stands for 45 minutes with 15-minute break.

If you have private lessons, you usually choose how many hours a day you study. The most efficient, IMHO, is two academic hours a day, so you will have two days a week. And this is most common for class studying.

As per 7 weeks gap, there are public holidays when there are no lessons. Finally, you have about 2 weeks gap between studying years, that are used by schools to assemble classes for next year of study.