| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] [to-vb] [prep] [adv] [num] hour | 7 |
|
| 2 | [vb base] [to-vb] [prep] [adv] [num] hour | 7 |
|
| 3 | [vb base] [to-vb] [prep] about [num] hour | 5 |
|
| 4 | [vb base] [to-vb] [prep] about [num] hour | 5 |
|
