| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] 30 per [unc] | 237 |
|
| 2 | at [adv] 30 [unc] | 18 |
|
| 3 | at [adv] 30 per | 17 |
|
| 4 | at 30 per [unc] | 15 |
|
