| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] 30 per [no cls] | 237 |
|
| 2 | under 30 per [no cls] | 9 |
|
| 3 | [adv] under 30 per | 6 |
|
| 4 | [adv] under 30 [no cls] | 6 |
|
