| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] about [adj] per | 369 |
|
| 2 | [prep] [adv] 30 per | 85 |
|
| 3 | [prep] about 30 [unc] | 26 |
|
| 4 | [prep] about 30 per | 25 |
|
