| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | back up [prep] [art] [adj] | 17 |
|
| 2 | back up [prep] [art] [adj] | 17 |
|
| 3 | back up [prep] the [adj] | 15 |
|
| 4 | back up [prep] [art] [adj] | 12 |
|
| 5 | back up to [art] [adj] | 9 |
|
| 6 | back up to [art] [adj] | 9 |
|
