| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | necessary first step | 12 |
|
| 2 | necessary first [noun] | 12 |
|
| 3 | necessary first [noun] | 12 |
|
| 4 | necessary first step | 11 |
|
| 5 | necessary first [noun sg] | 11 |
|
