| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] [adv] essential for [art] | 10 |
|
| 2 | it [be] [adv] essential for [art] | 10 |
|
| 3 | it [be] [adv] essential for the | 8 |
|
| 4 | it [be] [adv] essential for the | 8 |
|
| 5 | it [be] [adv] essential for [noun] | 6 |
|
