| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] at [noun] | 5964 |
|
| 2 | often [vb past] [noun] | 164 |
|
| 3 | often at [noun] | 57 |
|
| 4 | often [vb past] at | 19 |
|
