| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] [prep] [adv] a hour | 8 |
|
| 2 | [vb base] [prep] [adv] a hour | 8 |
|
| 3 | [vb base] [prep] [adv] an hour | 8 |
|
| 4 | [vb base] [prep] [adv] a hour | 8 |
|
| 5 | [vb base] for [adv] a hour | 7 |
|
| 6 | [vb base] for [adv] a hour | 7 |
|
| 7 | [vb base] [prep] about a hour | 6 |
|
| 8 | [vb base] [prep] about a hour | 6 |
|
