| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] at the heart of | 199 |
|
| 2 | [conj] at the heart of | 31 |
|
| 3 | [verb] [conj] the heart of | 7 |
|
| 4 | [verb] [conj] at the heart | 7 |
|
