| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [is] based [prep] | 1362 |
|
| 2 | system [is] [verb] [prep] | 337 |
|
| 3 | system [is] [vb pp] [prep] | 309 |
|
| 4 | system [be] based [prep] | 52 |
|
| 5 | system [is] base [prep] | 32 |
|
