| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | necessary for the [noun] [prep] | 231 |
|
| 2 | necessary for the [noun sg] [prep] | 209 |
|
| 3 | [adj] for the purpose [prep] | 79 |
|
| 4 | necessary for the purpose [prep] | 15 |
|
| 5 | necessary [prep] the purpose [prep] | 11 |
|
| 6 | necessary [prep] the purpose [prep] | 11 |
|
| 7 | necessary for the purpose [prep] | 10 |
|
| 8 | necessary for [art] purpose [prep] | 10 |
|
| 9 | necessary for the purpose [prep] | 10 |
|
| 10 | necessary for [art] purpose [prep] | 10 |
|
| 11 | necessary for the purpose [prep] | 10 |
|
