| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [modal v] account for | 76 |
|
| 2 | which [modal v] account for | 38 |
|
| 3 | [noun sg] which account for | 34 |
|
| 4 | [noun sg] which [modal v] account | 8 |
|
