| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it become increasingly [adj] | 80 |
|
| 2 | it become [adv] difficult | 55 |
|
| 3 | it become [adv] difficult | 55 |
|
| 4 | [pron] become increasingly difficult | 23 |
|
| 5 | [pers pn] become increasingly difficult | 22 |
|
| 6 | it become increasingly difficult | 21 |
|
| 7 | it become increasingly difficult | 21 |
|
| 8 | it [verb] increasingly difficult | 21 |
|
