| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] research and [noun sg] department | 11 |
|
| 2 | [noun] research and [noun sg] department | 11 |
|
| 3 | library research and [noun sg] department | 10 |
|
| 4 | library research and [noun sg] department | 10 |
|
