| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] hours at [art] time | 7 |
|
| 2 | [noun sg] [prep] hours at [art] time | 5 |
|
| 3 | [verb] [prep] hours at [art] time | 5 |
|
| 4 | [prep] [adj] hours at [art] time | 12 |
|
| 5 | [prep] [num] hours at [art] time | 9 |
|
