| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at which [pron] [vb mod] [verb] | 92 |
|
| 2 | point at which [pron] [verb] | 36 |
|
| 3 | point at which [pron] [vb mod] | 21 |
|
| 4 | point which [pron] [vb mod] [verb] | 5 |
|
