| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [noun] [conj] [art] | 778 |
|
| 2 | [noun] to ensure [conj] [art] | 514 |
|
| 3 | [vb pp] to ensure [conj] [art] | 208 |
|
| 4 | [vb pp] [noun] to ensure [conj] | 9 |
|
