| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [verb] to ensure that [noun] | 18 |
|
| 2 | is [vb pp] to ensure that [noun] | 17 |
|
| 3 | is [verb] to ensure that [noun pl] | 11 |
|
| 4 | is design to ensure that [noun] | 5 |
|
| 5 | is designed to ensure that [noun] | 5 |
|
