| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at which [verb] | 243 |
|
| 2 | [prep] which point | 133 |
|
| 3 | [prep] which point | 133 |
|
| 4 | at [pron] point | 122 |
|
| 5 | at which point | 120 |
|
