| horizontally | 5 | manner |
| together | 4 | manner |
| depending on the application | 3 | other |
| fuel cell → be → stacked | 14 |
| fuel cell → be stacked on → top of one | 3 |
| negative | neutral | positive |
| 0.061 | 0.792 | 0.147 |
| Raw frequency | 17 |
| Normalized frequency | 0.349 |
| Modifier score | 0.700 |
| Perplexity | 219.763 |