| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | back [prep] [art] [noun pl] | 1204 |
|
| 2 | back [prep] [art] [noun pl] | 1204 |
|
| 3 | [adv] at [art] [noun pl] | 930 |
|
| 4 | back at [art] [noun] | 639 |
|
| 5 | [adv prt] at [art] [noun pl] | 402 |
|
| 6 | back at [art] [noun pl] | 51 |
|
| 7 | back at [art] [noun pl] | 51 |
|
