| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | back at the [noun] | 627 |
|
| 2 | back [prep] the hospital | 47 |
|
| 3 | [adv] at the hospital | 41 |
|
| 4 | back at [art] hospital | 7 |
|
| 5 | back at the hospital | 7 |
|
| 6 | back at [art] hospital | 7 |
|
