| Value | Category | Cases | |
|---|---|---|---|
| 1 | Hourly | 24 |
4.7%
|
| 2 | Daily | 125 |
24.6%
|
| 3 | Weekly | 29 |
5.7%
|
| 4 | Monthly | 296 |
58.3%
|
| 5 | Once off | 15 |
3%
|
| 6 | Others | 4 |
0.8%
|
| 7 | Unknown | 15 |
3%
|
| Sysmiss | 4036 |