Attending general surgeon schedules will very widely. At our community hospital, 8 surgeons from 3 different groups take shared call for unreferred admissions during the week, with one surgeon covering each weekend. Within one group, one surgeon out of 4 will be the on-call guy for their group any given week. Not a bad schedule, but if we had a rough week that included a number of late night/emergency cases, then they'd look pretty beat up by week's end.
The academic surg onc attendings I worked with had a similar plan with call coverage spread out among the 5 surgeons during the week, each one covering a weekend for the group. Each attending has clinic once a week and only came in for emergencies, which were rare. The in-house fellows took care of floor/ICU pages and outside calls.