| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] back in [num] | 40 |
|
| 2 | way back in [adj] | 29 |
|
| 3 | [adv] back in [adj] | 14 |
|
| 4 | further back in [adj] | 5 |
|
| 5 | [adv] back in [num ord] | 5 |
|
