| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been several [noun] | 46 |
|
| 2 | [vb base] been several [noun pl] | 45 |
|
| 3 | [vb base] been several attempt | 8 |
|
| 4 | [vb base] been several attempts | 8 |
|
