| during early | 2 | temporal |
| as an economical form of transport | 2 | manner |
| especially | 2 | degree |
| design → be → popular | 4 |
| design → prove → popular | 3 |
| design → become → popular | 3 |
| negative | neutral | positive |
| 0.004 | 0.248 | 0.749 |
| Raw frequency | 10 |
| Normalized frequency | 0.326 |
| Modifier score | 0.500 |
| Perplexity | 101.799 |