Hi, evic, thanks for your interest!
As far as I'm aware, they rehearse at least once a week. This can be extended if the director sees the cast needs more.
the vast majority of shows plays from Wednesday to Sunday, being evening performances at Wednesday, Thursday and Friday, two performances at Saturday and a matinée at Sundays. However, T4F (the company who brought Beauty and the Beast, Cats, Phantom of the Opera. , The Lion King, Sister Act and now Wicked, among others), started doing two performances at Sundays as well in their last biggest productions at Teatro Renault, where Wicked will be performed. But even they don't do it for their smaller productions at other theatres.
I honestly don't remember a show having more performances than that, but it is common for very small productions to have less performances a week.
Some productions also have closed matinées at Wednesday or Thursday for schools. Depends much on the show. Also, it's not of our culture to go out at Mondays or Tuesdays, so I it could work very well don't think it would work too well.
I don't know if there are a rule limiting the amount of shows, but our work laws grants at least one day off a week.
The biggest productions generally open in Sao Paulo, rarely going to Rio de Janeiro. The only two replica productions that I remember going to Rio are Cats and The Addams Family, and yet, their run there were significantly shorter.
Big local productions from other companies open both in Sao Paulo and Rio, usually travelling to the other city after. Some productions tour to some cities after, but for a very limited number of cities.