| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | there has been a [adj] | 702 |
|
| 2 | has [adv] been a [adj] | 319 |
|
| 3 | there has [adv] been a | 259 |
|
| 4 | there has [adv] been [adj] | 139 |
|
