| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [num] hours [verb] | 160 |
|
| 2 | [verb] [verb] [num] hours | 143 |
|
| 3 | [verb] [verb] [num] [verb] | 137 |
|
| 4 | [verb] [verb] hours [verb] | 21 |
|
