| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [adv] used | 1258 |
|
| 2 | [is] [adv] used | 1131 |
|
| 3 | [is] rarely [verb] | 211 |
|
| 4 | [is] rarely [vb pp] | 207 |
|
| 5 | [be] rarely used | 54 |
|
| 6 | [is] rarely used | 19 |
|
| 7 | [is] rarely use | 19 |
|
