| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | by which [verb] | 179 |
|
| 2 | by which [vb base] | 59 |
|
| 3 | [prep] which date | 32 |
|
| 4 | [prep] which date | 32 |
|
| 5 | by which date | 5 |
|
| 6 | by [pron] date | 5 |
|
| 7 | by which date | 5 |
|
