| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | important source of [noun] for | 32 |
|
| 2 | important source of [noun] for | 32 |
|
| 3 | important source of [noun sg] for | 26 |
|
| 4 | important source of [noun pl] for | 6 |
|
| 5 | important source of information for | 5 |
|
| 6 | important source of information for | 5 |
|
