| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [noun pl] ['s] [noun] | 589 |
|
| 2 | [prep] [art] [noun pl] ['s] practice | 28 |
|
| 3 | [prep] a [noun] ['s] practice | 21 |
|
| 4 | [prep] a [noun pl] [unc] practice | 8 |
|
