| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] a few hours | 20 |
|
| 2 | [vb infin] a few hours | 20 |
|
| 3 | [vb infin] a [det] hours | 20 |
|
| 4 | take a [adj] hours | 5 |
|
