| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it is [vb pp] | 4742 |
|
| 2 | it is often [vb pp] | 362 |
|
| 3 | [conj] it is often | 213 |
|
| 4 | [conj] is often [vb pp] | 140 |
|
