560
visitDuration>=0;visitDuration<=10
26
visitDuration>=11;visitDuration<=30
25
visitDuration>=31;visitDuration<=60
19
visitDuration>=60;visitDuration<=120
35
visitDuration>=120;visitDuration<=240
49
visitDuration>=240;visitDuration<=420
14
visitDuration>=420;visitDuration<=600
4
visitDuration>=600;visitDuration<=900
9
visitDuration>=900;visitDuration<=1800
1
visitDuration>=1801