| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] which [vb base] [art] | 265 |
|
| 2 | at which [verb] [art] | 67 |
|
| 3 | at [pron] [vb base] [art] | 63 |
|
| 4 | at [Wh det] [vb base] [art] | 53 |
|
| 5 | at which [vb base] [art] | 53 |
|
| 6 | at which [vb base] [art] | 53 |
|
