| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | back [prep] a [noun sg] of [noun pl] | 40 |
|
| 2 | back [prep] a [noun sg] of [noun pl] | 40 |
|
| 3 | back [prep] a [noun sg] of [noun pl] | 40 |
|
| 4 | back [prep] a couple of [noun pl] | 17 |
|
| 5 | back in a [noun sg] of [noun pl] | 12 |
|
| 6 | back in a [noun sg] of [noun pl] | 12 |
|
| 7 | back to a [noun sg] of [noun pl] | 7 |
|
| 8 | back to a [noun sg] of [noun pl] | 7 |
|
| 9 | back [prep] a [noun sg] of weeks | 5 |
|
| 10 | back [prep] a [noun sg] of hours | 5 |
|
