| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [num] per [unc] | 11672 |
|
| 2 | about [num] per [unc] | 1293 |
|
| 3 | [prep] about [num] [unc] | 397 |
|
| 4 | [prep] about [num] per | 369 |
|
