| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | only about [num] per | 116 |
|
| 2 | only about [adj] per | 116 |
|
| 3 | only [adv] 10 per | 16 |
|
| 4 | [adv] about 10 per | 16 |
|
| 5 | only about 10 per | 12 |
|
| 6 | only about 10 [unc] | 12 |
|
