| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | and a [noun] [prep] | 12754 |
|
| 2 | system and [noun] [prep] | 107 |
|
| 3 | system and a [noun] | 43 |
|
| 4 | system a [noun] [prep] | 14 |
|
