| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [num] hours [verb] | 160 |
|
| 2 | [modal v] [verb] [num] hours | 67 |
|
| 3 | [modal v] [verb] [num] [verb] | 50 |
|
| 4 | [modal v] [verb] hours [verb] | 27 |
|
