| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] for two years | 64 |
|
| 2 | on for [adj] years | 48 |
|
| 3 | on for [num] years | 36 |
|
| 4 | [adv prt] for two years | 24 |
|
| 5 | on for two [noun] | 24 |
|
| 6 | on for two [noun pl] | 23 |
|
| 7 | on [prep] two years | 10 |
|
| 8 | on for two years | 9 |
|
| 9 | on for two year | 9 |
|
| 10 | on for two years | 9 |
|
