| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] often [verb] | 32 |
|
| 2 | it is [adv] often [vb pp] | 32 |
|
| 3 | it is [adv] often use | 7 |
|
| 4 | it is most often [verb] | 7 |
|
| 5 | it is [adv] often used | 7 |
|
| 6 | it is so often [verb] | 6 |
|
| 7 | it is more often [verb] | 5 |
|
