| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [vb -s] [conj] | 2300 |
|
| 2 | [conj] to ensure [conj] | 220 |
|
| 3 | [vb -s] to ensure [conj] | 78 |
|
| 4 | [conj] [vb -s] to ensure | 7 |
|
