| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [verb] [conj] [art] [noun sg] | 621 |
|
| 2 | [vb pp] [to-vb] [conj] [art] [noun sg] | 541 |
|
| 3 | [verb] to ensure [conj] [art] [noun sg] | 220 |
|
| 4 | [vb pp] to ensure [conj] [art] [noun] | 153 |
|
| 5 | [vb pp] ensure [conj] [art] [noun sg] | 114 |
|
