| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] | 237912 |
|
| 2 | is [adv] | 164644 |
|
| 3 | [be] often | 9655 |
|
| 4 | be often | 9654 |
|
| 5 | [is] often | 4452 |
|
| 6 | is often | 4281 |
|
