| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | years ['s] [noun] | 1292 |
|
| 2 | years ['s] [noun sg] | 1249 |
|
| 3 | [noun] ['s] research | 301 |
|
| 4 | [noun pl] ['s] research | 31 |
|
| 5 | year ['s] research | 13 |
|
| 6 | years [unc] research | 9 |
|
| 7 | years ['s] research | 9 |
|
