| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | back at the [noun] | 627 |
|
| 2 | back at the [noun sg] | 523 |
|
| 3 | [adv] at the top | 222 |
|
| 4 | [adv prt] at the top | 80 |
|
| 5 | back [prep] the top | 61 |
|
| 6 | back at the top | 8 |
|
| 7 | back at [art] top | 8 |
|
| 8 | back at the top | 8 |
|
| 9 | back at the top | 8 |
|
| 10 | back at [art] top | 8 |
|
