| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [adv] [adj] [n mass] | 618 |
|
| 2 | at [adv] 30 [noun] | 63 |
|
| 3 | [prep] [adv] 30 [n mass] | 35 |
|
| 4 | [prep] [adv] 30 [n mass] | 35 |
|
| 5 | at [adv] 30 [n mass] | 18 |
|
| 6 | at [adv] 30 [n mass] | 18 |
|
