| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | years have been [prep] | 27 |
|
| 2 | year has been [prep] | 21 |
|
| 3 | year have been [prep] | 8 |
|
| 4 | year have been [prep] | 8 |
|
| 5 | year have been in | 8 |
|
| 6 | year had been [prep] | 6 |
|
