| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adj] role | 2306 |
|
| 2 | a [adj] role | 2190 |
|
| 3 | a vital [noun] | 934 |
|
| 4 | [art] vital role | 191 |
|
| 5 | [art] vital role | 191 |
|
| 6 | a vital role | 160 |
|
| 7 | a vital role | 160 |
|
