| as being more environmentally friendly | 7 | cause |
| usually | 3 | temporal |
| on board | 2 | location |
| bus → have → free wifi | 25 |
| bus → offer → free wifi | 11 |
| bus → have → free wi-fi | 10 |
| bus → offer → free wi-fi | 9 |
| bus → feature → free wifi | 5 |
| bus → come with → free wifi | 5 |
| bus → come with → free wi-fi | 4 |
| bus → provide → free wifi | 4 |
| negative | neutral | positive |
| 0.024 | 0.230 | 0.746 |
| Raw frequency | 73 |
| Normalized frequency | 0.560 |
| Modifier score | 0.871 |
| Perplexity | 238.830 |