| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a few hours of | 15 |
|
| 2 | [prep] a [det] hours of | 15 |
|
| 3 | [prep] a few hours of | 15 |
|
| 4 | within a [adj] hours of | 10 |
|
