| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [adv] [prep] a [adj] while | 6 |
|
| 2 | [vb past] [adv] [prep] a [adj] while | 6 |
|
| 3 | [vb past] [adv] for a [adj] while | 5 |
|
| 4 | [vb past] [adv] for a [adj] while | 5 |
|
