| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for about [adj] | 1333 |
|
| 2 | for about [num] | 1227 |
|
| 3 | [prep] about 20 | 143 |
|
| 4 | for [adv] 20 | 138 |
|
| 5 | for about 20 | 41 |
|
