| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv prt] for a couple [prep] hours | 9 |
|
| 2 | [adv prt] for a couple [prep] hour | 9 |
|
| 3 | [adv prt] for a couple of hour | 9 |
|
| 4 | [adv prt] for a couple of hour | 9 |
|
