| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] a few years back | 28 |
|
| 2 | [noun prp] a few years back | 14 |
|
| 3 | [noun sg] a few years back | 8 |
|
| 4 | [noun pl] a few years back | 6 |
|
