| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] back to | 666 |
|
| 2 | [adv] back to | 601 |
|
| 3 | then [adv] to | 360 |
|
| 4 | then back [prep] | 159 |
|
| 5 | then back to | 100 |
|
