| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be often [vb pp] that [noun pl] | 17 |
|
| 2 | it is often [vb pp] that [noun pl] | 17 |
|
| 3 | it be often assumed that [noun pl] | 6 |
|
| 4 | it be often said that [noun pl] | 5 |
|
