| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 28 |
2.5%
|
| 2 | Monthly | 179 |
16%
|
| 3 | Once a term | 496 |
44.4%
|
| 4 | Half Yearly | 41 |
3.7%
|
| 5 | Yearly | 115 |
10.3%
|
| 6 | Ad hoc | 55 |
4.9%
|
| 8 | Other (specify) | 204 |
18.2%
|
| Sysmiss | 477 |