| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [prep] [adv] a | 603 |
|
| 2 | [prep] [adv] a hour | 222 |
|
| 3 | [vb pp] [prep] a hour | 55 |
|
| 4 | [vb pp] [adv] a hour | 15 |
|
