| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] at [noun prp] | 890 |
|
| 2 | back at [noun prp] | 352 |
|
| 3 | back [to-vb] [noun prp] | 66 |
|
| 4 | back [to-vb] at | 43 |
|
