You can work up to 7 days should the company choose you to but its unusual. I've often worked 6 days in a row then had a few days off, but it could be 2,3,4 or 5. There isn't really a set pattern. It is quite possible to be rostered a single day off in the middle of blocks of work but that can't do it to you all month so you will get a run of a few days off somewhere. Can't really be anymore specific than that, you'll have to ask someone who's around the bottom of the seniority list what they are gettnig.