| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is required [prep] [art] | 235 |
|
| 2 | [is] required [prep] the | 184 |
|
| 3 | [is] required for [art] | 77 |
|
| 4 | [is] required in [art] | 39 |
|
| 5 | [is] required by [art] | 35 |
|
| 6 | [is] required [prep] a | 34 |
|
| 7 | [is] required of [art] | 15 |
|
| 8 | [is] required [prep] an | 13 |
|
| 9 | [is] required on [art] | 12 |
|
| 10 | [is] required at [art] | 10 |
|
| 11 | [is] required from [art] | 10 |
|
| 12 | [is] required as [art] | 6 |
|
| 13 | [is] required to [art] | 5 |
|
| 14 | [is] required under [art] | 5 |
|
