| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] hours [unc] [noun] | 39 |
|
| 2 | a [det] hours [unc] | 36 |
|
| 3 | a [det] [unc] [noun] | 29 |
|
| 4 | a [det] hours [noun] | 15 |
|
