| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [verb] for thousands of years | 9 |
|
| 2 | been [verb] for thousands of [noun pl] | 9 |
|
| 3 | been [verb] for thousands of [noun pl] | 9 |
|
| 4 | been [vb pp] for thousands of [noun pl] | 6 |
|
