| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] essential that [art] | 114 |
|
| 2 | it [is] essential that [noun pl] | 28 |
|
| 3 | it [is] that [art] [noun pl] | 23 |
|
| 4 | [is] essential that [art] [noun pl] | 22 |
|
