| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] 1990 when the [noun sg] | 6 |
|
| 2 | in 1990 when the [noun sg] | 6 |
|
| 3 | [prep] 1990 when the [noun sg] | 6 |
|
| 4 | in 1990 when the [noun sg] | 6 |
|
| 5 | [noun prp] 1990 when the [noun sg] | 5 |
|
| 6 | [noun] 1990 when the [noun sg] | 5 |
|
| 7 | 1990 when the [adj] [noun sg] | 6 |
|
| 8 | 1990 when the [noun sg] [verb] | 7 |
|
| 9 | 1990 when the [noun sg] [vb past] | 5 |
|
