| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be frequently [vb pp] that | 19 |
|
| 2 | it is frequently [vb pp] that | 16 |
|
| 3 | it [is] frequently [vb pp] that | 16 |
|
| 4 | it [be] frequently said that | 6 |
|
