| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv prt] [prep] three years ' | 7 |
|
| 2 | [adv prt] [prep] three years ['s] | 7 |
|
| 3 | [adv prt] [prep] three years [unc] | 7 |
|
| 4 | up [prep] three years [unc] | 7 |
|
| 5 | [adv prt] [prep] three years ' | 7 |
|
| 6 | [adv prt] to three years [unc] | 6 |
|
| 7 | [adv prt] to three years [unc] | 6 |
|
