| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] system [is] [adv] used | 7 |
|
| 2 | [art] system [is] [adv] used | 7 |
|
| 3 | the system [is] [adv] used | 6 |
|
| 4 | the system [is] [adv] used | 6 |
|
| 5 | system [is] [adv] used [prep] | 6 |
|
| 6 | system [is] [adv] used [prep] | 6 |
|
