| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is vital [prep] [verb] | 25 |
|
| 2 | is vital [prep] [v-ing] | 25 |
|
| 3 | is vital in [verb] | 13 |
|
| 4 | is vital for [verb] | 8 |
|
