| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [adv] 30 per cent | 17 |
|
| 2 | at [adv] 30 per [no cls] | 17 |
|
| 3 | at [adv] 30 per cent | 17 |
|
| 4 | at least 30 per [unc] | 10 |
|
