| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | couple of years [prep] | 71 |
|
| 2 | couple of year [prep] | 71 |
|
| 3 | couple of year of | 17 |
|
| 4 | couple of year in | 11 |
|
| 5 | couple of year after | 10 |
|
| 6 | couple of year before | 7 |
|
| 7 | couple of year on | 5 |
|
