| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [verb] a few hours | 15 |
|
| 2 | only [verb] a few hours | 10 |
|
| 3 | [adv] [vb pp] a few hours | 5 |
|
| 4 | [adv] take a few hours | 5 |
|
