| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | of a [noun sg] system [pron] | 9 |
|
| 2 | of a [noun] system [pron] | 8 |
|
| 3 | of a [noun] system [Wh det] | 6 |
|
| 4 | of a [noun] system which | 5 |
|
| 5 | of a [noun] system which | 5 |
|
