| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] when the [noun sg] | 338 |
|
| 2 | 1991 when the [noun] | 12 |
|
| 3 | 1991 when [art] [noun sg] | 10 |
|
| 4 | 1991 [adv] the [noun sg] | 8 |
|
| 5 | 1991 when the [noun sg] | 7 |
|
| 6 | 1991 [Wh adv] the [noun sg] | 7 |
|
