| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is vital that [noun] | 32 |
|
| 2 | it is vital that [adj] | 31 |
|
| 3 | is vital that [adj] [noun] | 24 |
|
| 4 | it is that [adj] [noun] | 17 |
|
