| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | by about [adj] | 240 |
|
| 2 | by about [num] | 224 |
|
| 3 | [prep] about 20 | 143 |
|
| 4 | by [adv] 20 | 31 |
|
| 5 | by about 20 | 10 |
|
