| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | of [num] per [no cls] | 2342 |
|
| 2 | about [num] per [no cls] | 1293 |
|
| 3 | of about [num] [no cls] | 104 |
|
| 4 | of about [num] per | 94 |
|
