chartCheck.ChartAreas[0].AxisX.IntervalType = Your type here;
chartCheck.ChartAreas[0].AxisX.IntervalType = DateTimeIntervalType.Days;
chart.ChartAreas["chart1"].AxisX.Interval = 10;

chartIncHalfHoursPerPerson.ChartAreas[0].AxisX.Interval = 1;
chartIncHalfHoursPerPerson.ChartAreas[0].AxisY.Interval = 1;

chartArea2.AxisY.Title = "Incompliant Half-Hours";
chartArea2.Name = "ChartArea1";
this.chartIncHalfHoursPerPerson.ChartAreas.Add(chartArea2);
chartIncHalfHoursPerPerson.ChartAreas[0].AxisX.Interval = 1;
chartIncHalfHoursPerPerson.ChartAreas[0].AxisY.Interval = 1;

chartIncHalfHoursPerPerson.ChartAreas[0].AxisX.Interval = 1;
chartIncHalfHoursPerPerson.ChartAreas[0].AxisY.Interval = 1;

chartIncHalfHoursPerPerson.ChartAreas[0].AxisX.Interval = 1;
chartIncHalfHoursPerPerson.ChartAreas[0].AxisY.Interval = 1;

chartIncHalfHoursPerPerson.ChartAreas[0].AxisX.Interval = 1;
chartIncHalfHoursPerPerson.ChartAreas[0].AxisY.Interval = 1;
chartIncHalfHoursPerPerson.ChartAreas[0].AxisX.ScrollBar.Size = 10;
chartIncHalfHoursPerPerson.ChartAreas[0].AxisX.ScrollBar.ButtonStyle = ScrollBarButtonStyles.SmallScroll;
chartIncHalfHoursPerPerson.ChartAreas[0].AxisX.ScrollBar.IsPositionedInside = true;
chartIncHalfHoursPerPerson.ChartAreas[0].AxisX.ScrollBar.Enabled = true;