| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [adv] a [adj] [noun] | 356 |
|
| 2 | [prep] [adv] a [adj] hour | 37 |
|
| 3 | at [adv] [art] [adj] hour | 10 |
|
| 4 | at [adv] [art] [adj] hour | 10 |
|
| 5 | at [adv] a [adj] hour | 5 |
|
| 6 | at [adv] a [adj] hour | 5 |
|
