| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [is] [adv] [vb pp] | 2170 |
|
| 2 | [is] [adv] often [vb pp] | 225 |
|
| 3 | [conj] [is] often [vb pp] | 142 |
|
| 4 | [conj] [is] [adv] often | 57 |
|
| 5 | [conj] [adv] often [vb pp] | 37 |
|
