| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] there have [adv] been | 14 |
|
| 2 | [noun pl] there have [adv] [been] | 14 |
|
| 3 | years there have [adv] [been] | 7 |
|
| 4 | [noun pl] there had [adv] [been] | 6 |
|
