| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | before [v-ing] for | 169 |
|
| 2 | before [verb] for | 169 |
|
| 3 | [prep] heading for | 22 |
|
| 4 | before heading [prep] | 22 |
|
| 5 | before heading [prep] | 22 |
|
| 6 | [prep] heading for | 22 |
|
| 7 | before heading for | 10 |
|
| 8 | before head for | 10 |
|
| 9 | before heading for | 10 |
|
