| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [noun] [unc] [noun] | 4054 |
|
| 2 | at [noun] [unc] [noun sg] | 2811 |
|
| 3 | [prep] [noun] [unc] training | 38 |
|
| 4 | at [noun] [unc] training | 5 |
|
