| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [det] hours | 324 |
|
| 2 | [vb infin] [prep] a [det] | 203 |
|
| 3 | [vb infin] a [det] hours | 20 |
|
| 4 | [vb infin] [prep] [det] hours | 15 |
|
