| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | ensure that [art] [noun] | 2006 |
|
| 2 | that [art] [det] [noun] | 685 |
|
| 3 | ensure that [det] [noun] | 570 |
|
| 4 | ensure that [art] [det] | 29 |
|
