| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [adv] [adv] [prep] a | 164 |
|
| 2 | [is] used [adv] [prep] a | 31 |
|
| 3 | [is] used [adv] [adv] [prep] | 27 |
|
| 4 | used [adv] [adv] [prep] a | 13 |
|
