| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] [noun] | 283698 |
|
| 2 | [prep] a [adj] [noun pl] | 8712 |
|
| 3 | [prep] [art] [adj] hours | 1146 |
|
| 4 | [prep] a [adj] hour | 580 |
|
