| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] for hours at [art] time | 6 |
|
| 2 | [verb] for hours at [art] time | 5 |
|
| 3 | for [adj] hours at [art] time | 7 |
|
| 4 | for [num] hours at [art] time | 5 |
|
