While being the Ba'al Kri'ah (Torah reader) in my shul, I need to relay information to the Gabbai regarding Torah usage. We have a limited number of usable Sifrei Torah and as we sometimes have a concurrent minyan, we occasionally lend one to the other minyan. I also need to get a better sense of when I need to roll Sifrei Torah when we need an extra 1 (or 2).
The configuration of the 4 parshiot seem a bit confusing. Some years we have 1 break, some years 2 breaks. Sometimes the break week(s) occur at different points. I'm looking for some source that explains when the break weeks occur. Is there anything around?