| Value | Category | Cases | |
|---|---|---|---|
| 1 | ad-hoc | 32 |
3.1%
|
| 2 | biweekly | 41 |
4%
|
| 3 | day | 43 |
4.2%
|
| 4 | monthly | 796 |
78%
|
| 5 | none | 65 |
6.4%
|
| 6 | other | 44 |
4.3%
|
| Sysmiss | 195 |