| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | by [art] [num] per | 40 |
|
| 2 | by [art] [adj] per | 40 |
|
| 3 | by a [adj] per | 30 |
|
| 4 | by the [adj] per | 8 |
|
| 5 | by [art] 20 per | 5 |
|
| 6 | by [art] 20 per | 5 |
|
