| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] have [adv] often been | 11 |
|
| 2 | [noun pl] have [adv] often been | 9 |
|
| 3 | have [adv] often been [vb pp] | 10 |
|
| 4 | have [adv] often been [verb] | 10 |
|
