| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] often [verb] | 386 |
|
| 2 | it [is] often [vb pp] | 383 |
|
| 3 | it [is] [adv] used | 208 |
|
| 4 | it [is] [adv] used | 177 |
|
| 5 | [pron] [is] often used | 32 |
|
| 6 | it [be] often used | 22 |
|
| 7 | it [is] often used | 17 |
|
| 8 | it [is] often use | 17 |
|
