| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] is essential for [verb] | 15 |
|
| 2 | [noun sg] is essential for [verb] | 13 |
|
| 3 | is essential for [noun] [verb] | 9 |
|
| 4 | is essential for [noun pl] [verb] | 5 |
|
| 5 | is essential for [verb] [noun] | 6 |
|
