| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [det] hours [prep] [noun sg] [prep] | 9 |
|
| 2 | a few hours [prep] [noun sg] [prep] | 6 |
|
| 3 | a few hours [prep] [noun sg] [prep] | 6 |
|
| 4 | a [adj] hours of [noun sg] [prep] | 6 |
|
