| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | 20 years ' [noun sg] | 45 |
|
| 2 | 20 year ' [noun sg] | 45 |
|
| 3 | 20 year ' [noun sg] | 45 |
|
| 4 | 20 year ' imprisonment | 15 |
|
| 5 | 20 year ' experience | 13 |
|
| 6 | 20 year ' service | 5 |
|
