| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [adv] 20 per | 25 |
|
| 2 | [adv] about 20 per | 11 |
|
| 3 | be [adv] about 20 | 10 |
|
| 4 | be about 20 per | 6 |
|
