| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] back [prep] the previous | 22 |
|
| 2 | [verb] back to the previous | 16 |
|
| 3 | [vb pp] back [prep] the previous | 5 |
|
| 4 | [to-vb] back [prep] the previous | 5 |
|
