| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [verb] for a | 2158 |
|
| 2 | [verb] for a while | 507 |
|
| 3 | [adv] for a while | 391 |
|
| 4 | [adv] [verb] a while | 9 |
|
