| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [prep] [art] [noun] | 85689 |
|
| 2 | back [prep] [art] [noun] | 12678 |
|
| 3 | [vb past] back [prep] [art] | 3394 |
|
| 4 | [vb past] back [prep] [noun] | 1722 |
|
| 5 | [vb past] back [art] [noun] | 466 |
|
