| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] back [prep] the [num ord] | 28 |
|
| 2 | [vb pp] back [prep] the [num ord] | 28 |
|
| 3 | [vb pp] back to the [num ord] | 17 |
|
| 4 | traced back [prep] the [num ord] | 8 |
|
| 5 | [vb pp] back [prep] the first | 5 |
|
| 6 | [vb pp] back [prep] the second | 5 |
|
