| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [adv] [adj] years [prep] | 358 |
|
| 2 | [prep] [adv] [num] years [prep] | 316 |
|
| 3 | [prep] [adv] twenty [noun] [prep] | 40 |
|
| 4 | [prep] [adv] twenty [noun pl] [prep] | 37 |
|
| 5 | [prep] [adv] twenty years [prep] | 15 |
|
| 6 | [prep] [adv] twenty year [prep] | 15 |
|
| 7 | [prep] [adv] twenty years [prep] | 15 |
|
