| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they have a [adj] understanding of | 7 |
|
| 2 | they have a [adj] understanding [prep] | 7 |
|
| 3 | they have a [adj] understanding [prep] | 7 |
|
| 4 | they have a [adj] understanding of | 7 |
|
