| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for a few hours [prep] | 26 |
|
| 2 | for a few hours [prep] | 26 |
|
| 3 | for a [det] hours [prep] | 26 |
|
| 4 | for a [adj] hours in | 8 |
|
| 5 | for a [adj] hours at | 6 |
|
