| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have been [verb] for [noun pl] | 31 |
|
| 2 | it [verb] been [vb pp] for [noun pl] | 25 |
|
| 3 | it [vb -s] been [verb] for [noun pl] | 18 |
|
| 4 | it had been [verb] for [noun pl] | 13 |
|
| 5 | it [vb past] been [verb] for [noun pl] | 13 |
|
| 6 | it has been [verb] for [noun pl] | 12 |
|
| 7 | it [verb] been know for [noun pl] | 8 |
|
| 8 | it [verb] been known for [noun pl] | 8 |
|
| 9 | it 's been [verb] for [noun pl] | 6 |
|
| 10 | it [verb] been [v-ing] for [noun pl] | 6 |
|
| 11 | it [verb] been [verb] for centuries | 6 |
|
