| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which is [adj] for the | 80 |
|
| 2 | [pron] is essential for the | 34 |
|
| 3 | which [be] essential for the | 18 |
|
| 4 | which be essential for the | 18 |
|
| 5 | which is essential [prep] the | 16 |
|
| 6 | which is essential for [art] | 8 |
|
| 7 | which [is] essential for the | 8 |
|
