| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [adv] a few hours [prep] | 6 |
|
| 2 | [vb past] [prep] a few hours [prep] | 5 |
|
| 3 | [vb past] [prep] a few hours [prep] | 5 |
|
