| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [prep] a while | 342 |
|
| 2 | [adv] [prep] a long | 263 |
|
| 3 | [prep] a long while | 120 |
|
| 4 | [adv] a long while | 9 |
|
