| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [vb past] on [noun] | 209 |
|
| 2 | [pron] [vb past] on april | 23 |
|
| 3 | which [vb past] [prep] april | 15 |
|
| 4 | which [vb past] [prep] april | 15 |
|
| 5 | which [verb] on april | 10 |
|
| 6 | which [vb past] on april | 7 |
|
