| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] for 30 years | 81 |
|
| 2 | for over 30 years | 43 |
|
| 3 | [noun] for over 30 | 30 |
|
| 4 | [noun] over 30 years | 8 |
|
