| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [not/n't] [verb] | 1158 |
|
| 2 | it is often [verb] | 364 |
|
| 3 | it is [not/n't] often | 34 |
|
| 4 | is [not/n't] often [verb] | 33 |
|
