| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | back up [prep] the | 93 |
|
| 2 | back up [prep] the | 93 |
|
| 3 | [adv] up at the | 51 |
|
| 4 | back [adv] at the | 33 |
|
| 5 | back [adv prt] at the | 16 |
|
| 6 | back up at [art] | 6 |
|
| 7 | back up at [art] | 6 |
|
| 8 | back up at the | 6 |
|
| 9 | back up at the | 6 |
|
| 10 | back up at the | 6 |
|
