| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [num] [Wh adv] an | 44 |
|
| 2 | [num] when an | 33 |
|
| 3 | [num] [adv] an | 33 |
|
| 4 | [num] when an | 33 |
|
| 5 | [num] following an | 17 |
|
| 6 | [num] following an | 17 |
|
| 7 | [num] where an | 10 |
|
| 8 | [num] where an | 10 |
|
| 9 | 1989 [adv] an | 6 |
|
