| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [prep] 20 years | 45 |
|
| 2 | [adv prt] [prep] 20 years | 24 |
|
| 3 | [adv] to 20 years | 23 |
|
| 4 | [adv] to 20 years | 23 |
|
| 5 | up [prep] 20 years | 22 |
|
| 6 | up [prep] 20 years | 22 |
|
| 7 | [adv] [prep] 20 years | 20 |
|
| 8 | [adv] for 20 years | 11 |
|
| 9 | [adv] for 20 years | 11 |
|
| 10 | [adv] after 20 years | 5 |
|
| 11 | [adv] after 20 years | 5 |
|
