| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [adj] years | 23108 |
|
| 2 | [prep] 20 [noun] | 2066 |
|
| 3 | [prep] 20 [noun pl] | 1337 |
|
| 4 | [prep] 20 year | 506 |
|
| 5 | [prep] 20 years | 501 |
|
