| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [prep] a [noun] | 35545 |
|
| 2 | back [prep] [art] [noun] | 12678 |
|
| 3 | back [prep] [art] [noun] | 12678 |
|
| 4 | back [prep] a [noun] | 1030 |
|
| 5 | back [prep] a [noun] | 921 |
|
