| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] [verb] [prep] | 1590 |
|
| 2 | is [adv] often [verb] [prep] | 114 |
|
| 3 | it is often [verb] [prep] | 102 |
|
| 4 | it is [adv] often [verb] | 32 |
|
| 5 | it [adv] often [verb] [prep] | 5 |
|
