| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [prep] a long | 518 |
|
| 2 | [prep] a long while | 120 |
|
| 3 | [vb pp] [prep] a while | 106 |
|
| 4 | [vb pp] a long while | 5 |
|
