| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] [adv] necessary | 75 |
|
| 2 | it is [adv] necessary for | 66 |
|
| 3 | it is [adv] [adv] for | 62 |
|
| 4 | it is [adv] necessary for | 26 |
|
| 5 | is [adv] [adv] necessary for | 14 |
|
