Like any program, a skilled coach can program as many days a week as one would like during a powerbuilding program. That said, it is suggested that you take at least one day off from training. Keep in mind that the more training you do across the week doesn’t mean you can exceed weekly training volume ranges, but rather this allows you to do less volume per day, with the trade-off that the sets and reps you do on any given day will be done with greater emphasis on quality reps (since you won’t be exhausted after doing 10-15 sets of other exercises in the same workout.