| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is a vital part | 44 |
|
| 2 | is a vital factor | 11 |
|
| 3 | is a vital ingredient | 8 |
|
| 4 | is a vital element | 7 |
|
| 5 | is a vital component | 5 |
|
