| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [det] hours | 324 |
|
| 2 | a [det] hours [adv] | 179 |
|
| 3 | [prep] a [det] [adv] | 65 |
|
| 4 | [prep] [det] hours [adv] | 21 |
|
