| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | department of the board [prep] [noun sg] | 7 |
|
| 2 | department of the board of [noun] | 7 |
|
| 3 | department of the board [prep] [noun] | 7 |
|
| 4 | department of the board [prep] trade | 6 |
|
| 5 | department of the board [prep] trade | 6 |
|
