| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | by [art] [noun] union | 59 |
|
| 2 | by the [noun] union | 46 |
|
| 3 | by [art] trade union | 41 |
|
| 4 | by [art] [noun sg] union | 41 |
|
| 5 | by [art] trade union | 30 |
|
| 6 | by [art] [noun pl] union | 14 |
|
| 7 | by a [noun] union | 13 |
|
| 8 | by [art] trades union | 11 |
|
