| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it is [verb] [conj] | 1146 |
|
| 2 | it is often [verb] [conj] | 163 |
|
| 3 | [conj] it is often [verb] | 75 |
|
| 4 | [conj] is often [verb] [conj] | 7 |
|
| 5 | [conj] it often [verb] [conj] | 7 |
|
