| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [adv] [adj] years | 2652 |
|
| 2 | [prep] [adv] [num] years | 2406 |
|
| 3 | [prep] [adv] 30 [noun] | 264 |
|
| 4 | [prep] [adv] 30 [noun pl] | 208 |
|
| 5 | [prep] [adv] 30 years | 104 |
|
| 6 | [prep] [adv] 30 years | 104 |
|
| 7 | [prep] [adv] 30 year | 104 |
|
