| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] often [verb] | 386 |
|
| 2 | it [is] often [vb pp] | 383 |
|
| 3 | it [is] [adv] seen | 70 |
|
| 4 | it [is] [adv] seen | 58 |
|
| 5 | [pron] [is] often seen | 16 |
|
| 6 | it [is] often see | 9 |
|
| 7 | it [be] often seen | 9 |
|
| 8 | it [is] often seen | 9 |
|
