| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | requirement [subord] to [noun sg] | 21 |
|
| 2 | requirement as to [noun sg] | 21 |
|
| 3 | requirements [subord] to [noun sg] | 13 |
|
| 4 | requirement [subord] to [noun sg] | 8 |
|
