| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] used [prep] | 641 |
|
| 2 | is often used [prep] | 83 |
|
| 3 | [adv] often used [prep] | 35 |
|
| 4 | is [adv] often used | 22 |
|
| 5 | is [adv] often [prep] | 13 |
|
