| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [adv] [art] [det] hours [prep] | 7 |
|
| 2 | [prep] [adv] [art] few hours [prep] | 7 |
|
| 3 | [prep] [adv] a [adj] hours [prep] | 7 |
|
| 4 | [prep] [adv] [art] few hours [prep] | 7 |
|
