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