| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [adv] as required | 7 |
|
| 2 | [adv] [adv] as required | 7 |
|
| 3 | as [adv] as required | 6 |
|
| 4 | [adv] often as required | 6 |
|
| 5 | as [adv] as required | 6 |
|
