| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is essential [conj] [det] [noun pl] | 24 |
|
| 2 | is essential that [det] [noun pl] | 22 |
|
| 3 | is essential [that] [det] [noun pl] | 22 |
|
| 4 | is essential that [det] [noun pl] | 22 |
|
| 5 | is essential [conj] all [noun pl] | 11 |
|
| 6 | is essential [conj] these [noun pl] | 5 |
|
