| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] of [adj] importance | 28 |
|
| 2 | have been of [adj] importance | 28 |
|
| 3 | have [been] of [adj] importance | 28 |
|
| 4 | have [been] of [adj] importance | 26 |
|
| 5 | has [been] of [adj] importance | 13 |
|
| 6 | have [been] of [adj] importance | 6 |
|
