| together | 5 | manner |
| with fuel cells | 4 | other |
| usually | 2 | degree |
| hydrogen → be → mixed | 13 |
| hydrogen → be used in → combination | 3 |
| hydrogen → be → combined | 3 |
| negative | neutral | positive |
| 0.129 | 0.692 | 0.179 |
| Raw frequency | 19 |
| Normalized frequency | 0.343 |
| Modifier score | 0.850 |
| Perplexity | 161.441 |