| Value | Category | Cases | |
|---|---|---|---|
| 1 | Hourly | 2 |
2.7%
|
| 2 | Daily | 14 |
18.9%
|
| 3 | Weekly | 8 |
10.8%
|
| 4 | Monthly | 45 |
60.8%
|
| 5 | Once off | 2 |
2.7%
|
| 6 | Others | 1 |
1.4%
|
| 7 | Unknown | 2 |
2.7%
|
| Sysmiss | 4470 |