| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] 30 per [no cls] | 246 |
|
| 2 | to 30 per [no cls] | 99 |
|
| 3 | to [adv] 30 [no cls] | 15 |
|
| 4 | to [adv] 30 per | 15 |
|
