| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] [noun] [prep] [noun sg] | 17617 |
|
| 2 | [prep] [art] [adj] hour [prep] [noun sg] | 82 |
|
| 3 | [prep] a [adj] hour [prep] [noun] | 31 |
|
| 4 | [prep] a [adj] hour [prep] [noun sg] | 22 |
|
