| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] back [prep] [noun prp] | 529 |
|
| 2 | [vb pp] back [prep] [noun prp] | 529 |
|
| 3 | [vb pp] [adv] at [noun prp] | 391 |
|
| 4 | [verb] back at [noun prp] | 202 |
|
| 5 | [vb pp] back at [noun] | 25 |
|
| 6 | [vb pp] back at [noun prp] | 9 |
|
