| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] [vb pp] by | 3818 |
|
| 2 | is often [vb pp] by | 195 |
|
| 3 | is [adv] often [vb pp] | 187 |
|
| 4 | [adv] often [vb pp] by | 72 |
|
