| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] back [prep] an | 29 |
|
| 2 | [v-ing] back to an | 16 |
|
| 3 | going back [prep] an | 8 |
|
| 4 | coming back [prep] an | 6 |
|
