| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | back up [art] [noun sg] to | 7 |
|
| 2 | back up [art] [noun sg] to | 7 |
|
| 3 | back up the [noun sg] to | 6 |
|
| 4 | back up the [noun sg] to | 6 |
|
