| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for [num] years on | 52 |
|
| 2 | for [det] years on | 17 |
|
| 3 | for many years on | 14 |
|
| 4 | for many years on | 14 |
|
| 5 | for two years on | 12 |
|
| 6 | for two years on | 12 |
|
| 7 | for three years on | 6 |
|
| 8 | for three years on | 6 |
|
| 9 | for seven years on | 5 |
|
| 10 | for five years on | 5 |
|
| 11 | for four years on | 5 |
|
| 12 | for seven years on | 5 |
|
| 13 | for four years on | 5 |
|
| 14 | for five years on | 5 |
|
