| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] it is [adv] [vb pp] [conj] | 140 |
|
| 2 | [coord] it is [adv] [vb pp] [conj] | 114 |
|
| 3 | [conj] it is often [vb pp] [conj] | 16 |
|
| 4 | [coord] it be often [vb pp] [conj] | 12 |
|
| 5 | [coord] it [be] often [vb pp] [conj] | 12 |
|
| 6 | [coord] it [is] often [vb pp] [conj] | 10 |
|
| 7 | [coord] [pron] is often [vb pp] [conj] | 9 |
|
| 8 | [coord] it is often [verb] [conj] | 8 |
|
| 9 | [coord] it is often [vb pp] [conj] | 8 |
|
