| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | in which [verb] [pron] | 168 |
|
| 2 | year in which [pron] | 99 |
|
| 3 | year in which [verb] | 19 |
|
| 4 | year which [verb] [pron] | 9 |
|
