| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a couple of week [prep] | 22 |
|
| 2 | [prep] a couple of weeks [prep] | 22 |
|
| 3 | [prep] a couple of week [prep] | 22 |
|
| 4 | for a couple of week [prep] | 13 |
|
| 5 | [prep] a couple of week in | 5 |
|
| 6 | [prep] a couple of week in | 5 |
|
