| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [num] [unc] | 13665 |
|
| 2 | [prep] [num] hours | 3161 |
|
| 3 | [num] hours [unc] | 192 |
|
| 4 | [prep] hours [unc] | 24 |
|
