| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] at [noun] | 1453 |
|
| 2 | back at [noun] | 688 |
|
| 3 | [vb infin] back [noun] | 89 |
|
| 4 | [vb infin] back at | 75 |
|
