| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] become a [adj] feature of | 13 |
|
| 2 | have become a [adj] feature of | 13 |
|
| 3 | [vb -s] become a [adj] feature of | 6 |
|
| 4 | has become a [adj] feature of | 6 |
|
| 5 | have become a [adj] feature of | 5 |
|
| 6 | [vb base] become a [adj] feature of | 5 |
|
| 7 | become a [adj] feature of [noun] | 5 |
|
