| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [adj] years [unc] hard [noun sg] | 12 |
|
| 2 | [prep] [adj] years [unc] hard [noun sg] | 12 |
|
| 3 | to [adj] years [unc] hard [noun sg] | 6 |
|
| 4 | to [adj] years [unc] hard [noun sg] | 6 |
|
