| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | back up [prep] [adj] | 83 |
|
| 2 | back up by [adj] | 64 |
|
| 3 | back up by [adj] | 64 |
|
| 4 | backed up [prep] [adj] | 41 |
|
| 5 | backed up [prep] [adj] | 40 |
|
| 6 | back up with [adj] | 17 |
|
| 7 | back up with [adj] | 17 |
|
