| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [adv] [adv] [adv] | 327 |
|
| 2 | back [adv] [adv] [adv] | 47 |
|
| 3 | back at [adv] [adv] | 10 |
|
| 4 | back at [adv] [adv] | 10 |
|
