| from thermal flux | 13 | other |
| from the environment | 13 | location |
| from vibration | 7 | cause |
| energy → be → harvested | 133 |
| energy → be → harvesting | 3 |
| energy → be harvested for → example | 3 |
| negative | neutral | positive |
| 0.140 | 0.694 | 0.166 |
| Raw frequency | 139 |
| Normalized frequency | 0.610 |
| Modifier score | 0.467 |
| Perplexity | 252.639 |