186
visitDuration>=0;visitDuration<=10
23
visitDuration>=11;visitDuration<=30
22
visitDuration>=31;visitDuration<=60
28
visitDuration>=60;visitDuration<=120
20
visitDuration>=120;visitDuration<=240
14
visitDuration>=240;visitDuration<=420
4
visitDuration>=420;visitDuration<=600
4
visitDuration>=600;visitDuration<=900
11
visitDuration>=900;visitDuration<=1800
1
visitDuration>=1801