| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a per [unc] | 30 |
|
| 2 | a few per [unc] | 15 |
|
| 3 | [prep] a few [unc] | 13 |
|
| 4 | [prep] a few per | 5 |
|
