| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv prt] [prep] a [det] hour | 18 |
|
| 2 | [adv prt] [prep] a few hour | 16 |
|
| 3 | [adv prt] [prep] a [det] hours | 16 |
|
| 4 | [adv prt] for a [det] hour | 13 |
|
