| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | number of years [adv] | 32 |
|
| 2 | number [prep] years [adv] | 32 |
|
| 3 | number of years [adv] | 32 |
|
| 4 | number [prep] years ago | 15 |
|
| 5 | number [prep] years now | 10 |
|
