| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] at least 10 per | 8 |
|
| 2 | [prep] at least 10 per | 8 |
|
| 3 | [verb] at least 10 per | 5 |
|
| 4 | at least 10 per cent | 15 |
|
| 5 | at least 10 per [no cls] | 15 |
|
| 6 | at least 10 per [unc] | 15 |
|
| 7 | at least 10 per cent | 15 |
|
