| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it [be] often [adj] [prep] | 16 |
|
| 2 | [conj] it be often [adj] [prep] | 16 |
|
| 3 | [conj] it is often [adj] [prep] | 11 |
|
| 4 | [conj] it [is] often [adj] [prep] | 11 |
|
| 5 | [conj] it [be] often [adj] for | 7 |
|
| 6 | [subord] it [be] often [adj] [prep] | 7 |
|
| 7 | [coord] it [be] often [adj] [prep] | 6 |
|
| 8 | [conj] it was often [adj] [prep] | 5 |
|
| 9 | [conj] it [was/were] often [adj] [prep] | 5 |
|
| 10 | [conj] it [be] often difficult [prep] | 5 |
|
