| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [verb] to ensure that [adj] | 15 |
|
| 2 | is [verb] to ensure that [adj] | 14 |
|
| 3 | [is] [vb pp] to ensure that [adj] | 12 |
|
| 4 | [is] [verb] to ensure that [det] | 11 |
|
