| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | in [noun] 1991 it | 7 |
|
| 2 | in [noun prp] 1991 it | 7 |
|
| 3 | in 1991 it [verb] | 10 |
|
| 4 | in 1991 it [vb past] | 9 |
|
| 5 | in 1991 it [be] | 7 |
|
| 6 | in 1991 it be | 7 |
|
