| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [prep] [noun] | 76118 |
|
| 2 | often [prep] [noun] | 664 |
|
| 3 | often [vb past] [prep] | 367 |
|
| 4 | often [vb past] [noun] | 164 |
|
