| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to ensure that [adj] [noun pl] | 164 |
|
| 2 | is that [adj] [noun pl] | 56 |
|
| 3 | is to ensure that [noun pl] | 27 |
|
| 4 | is to ensure that [adj] | 16 |
|
