| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] back [prep] | 3877 |
|
| 2 | [v-ing] [adv] for | 3350 |
|
| 3 | [v-ing] [adv prt] for | 2001 |
|
| 4 | [verb] back for | 518 |
|
| 5 | [v-ing] back for | 83 |
|
