| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adj] hours a week | 12 |
|
| 2 | a [det] hours [art] week | 11 |
|
| 3 | a few hours [art] week | 8 |
|
| 4 | a few hours [art] week | 8 |
|
