| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] hours at a [noun sg] | 39 |
|
| 2 | a [adj] hours a [noun sg] | 28 |
|
| 3 | a [adj] at a [noun sg] | 15 |
|
| 4 | a [adj] hours at a | 5 |
|
