| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | on for [adj] years | 48 |
|
| 2 | on [prep] [num] years | 42 |
|
| 3 | on [prep] [det] years | 12 |
|
| 4 | on [prep] two years | 10 |
|
| 5 | on [prep] two years | 10 |
|
| 6 | on [prep] [adj] years | 9 |
|
| 7 | on in [adj] years | 8 |
|
| 8 | on [prep] recent years | 6 |
|
| 9 | on [prep] recent years | 6 |
|
| 10 | on [prep] several years | 5 |
|
| 11 | on [prep] several years | 5 |
|
| 12 | on [prep] four years | 5 |
|
| 13 | on [prep] four years | 5 |
|
