| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [num] year [unc] experience | 31 |
|
| 2 | least [num] year [unc] [noun] | 29 |
|
| 3 | least [num] [noun] [unc] experience | 6 |
|
| 4 | least [adj] year [unc] experience | 6 |
|
