| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | back in a [det] [noun pl] | 16 |
|
| 2 | back in a few [noun pl] | 16 |
|
| 3 | back in a [det] minutes | 7 |
|
| 4 | back in a [det] days | 5 |
|
