| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | open up the possibility of | 42 |
|
| 2 | open up the possibility of | 40 |
|
| 3 | opens up the possibility of | 18 |
|
| 4 | opened up the possibility of | 5 |
|
| 5 | opening up the possibility of | 5 |
|
