| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] a significant increase | 8 |
|
| 2 | [verb] [been] a significant increase | 8 |
|
| 3 | has [been] a significant increase | 6 |
|
| 4 | [vb -s] [been] a significant increase | 6 |
|
| 5 | [been] a significant increase [prep] | 7 |
|
| 6 | [been] a significant increase in | 7 |
|
| 7 | [been] a significant increase [prep] | 7 |
|
| 8 | [been] a significant increase in | 7 |
|
