| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | this may be due [prep] | 45 |
|
| 2 | this may be due [prep] | 45 |
|
| 3 | this may be due [prep] | 45 |
|
| 4 | this may be due to | 44 |
|
| 5 | this may be due to | 44 |
|
