We average about 8 days off a month, sometimes 9. It's not undusual to do 6days on the trot with 2 off. Sometimes you will get a single day off only. Finish on lates (2200-2230) and start on earlies (check in 0600). Although its not unusual for the lates to run late as it were. You find in the summer that you often don't make it to the 6th day anyway as you run out of hours after 5 days. The shift is anything from 6.5hrs to 11.5 hours although again this varies with discretion etc and roster changes. You have between 4 and 6 sectors a day.
Not sure what you mean about how standbys are handled. Basically its unusual not to be called. Between May last year and the end of sept i did no standbys as i was called everytime on the dot if it wasn't changed before the day anyway. You are more likely to do some standbys in winter.
The number of nightstops you do depend on fleet and base really. Generally the dash captains get absolutely hammered and spend alot of time away from home. At some bases they are only making it home for days off. This does change periodically though. Its difficult to give you a definitive answer as alot of these issues depend on base and fleet. At some bases you would do alot of standbys and at others none! At some of the bases roster changes are unusual and at others you're lucky if you do anything on your roster. Again some of the guys nightstop all the time and others don't nightstop as much if at all. Hope this helps!