| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] [prep] a | 58879 |
|
| 2 | back [prep] a | 1574 |
|
| 3 | [noun pl] back [prep] | 1224 |
|
| 4 | [noun pl] back a | 8 |
|
