| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] at the back | 233 |
|
| 2 | on at the [noun] | 232 |
|
| 3 | on [prep] the back | 56 |
|
| 4 | on at [art] back | 8 |
|
| 5 | on at the back | 8 |
|
| 6 | on at [art] back | 8 |
|
