| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | of [noun] [noun] for | 2109 |
|
| 2 | [noun] [noun] system for | 197 |
|
| 3 | of [noun] [noun] system | 170 |
|
| 4 | of [noun] system for | 16 |
|
