| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] it [is] necessary | 227 |
|
| 2 | it [is] necessary for | 116 |
|
| 3 | [noun] [is] necessary for | 86 |
|
| 4 | [noun] it [is] for | 41 |
|
