| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | year [coord] [adv] | 1685 |
|
| 2 | 20 year [adv] | 304 |
|
| 3 | 20 year [coord] | 111 |
|
| 4 | 20 [coord] [adv] | 68 |
|
