| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a few hours [prep] a | 7 |
|
| 2 | [prep] a few hours [prep] a | 7 |
|
| 3 | [prep] a few hours a [noun] | 9 |
|
| 4 | [prep] a few hours a [noun sg] | 9 |
|
