| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | back up by the [adj] [noun] | 13 |
|
| 2 | back up by the [adj] [noun sg] | 11 |
|
| 3 | backed up by the [adj] [noun] | 7 |
|
| 4 | backed up by the [adj] [noun] | 6 |
|
