| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun] [noun] [noun] for | 578 |
|
| 2 | a [noun] [noun] system [prep] | 75 |
|
| 3 | [art] [noun] [noun] system for | 50 |
|
| 4 | [art] [noun] [noun] system for | 50 |
|
| 5 | a [noun] [noun] system for | 26 |
|
