| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | only about [adj] | 577 |
|
| 2 | only about [num] | 520 |
|
| 3 | [adv] about 20 | 44 |
|
| 4 | only [adv] 20 | 21 |
|
| 5 | only about 20 | 17 |
|
