| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun prp] [prep] a [adj] hours | 8 |
|
| 2 | [noun prp] [prep] a [adj] hours | 8 |
|
| 3 | [noun prp] a [adj] hours [adv] | 6 |
|
| 4 | [noun prp] a [adj] hours [adv] | 6 |
|
