| very | 10 | degree |
| over the past fifty years | 3 | temporal |
| usually | 2 | degree |
| shipping → be → efficient | 27 |
| shipping → be → more efficient | 4 |
| shipping → be → more economical | 3 |
| shipping → become → more efficient | 3 |
| negative | neutral | positive |
| 0.024 | 0.188 | 0.788 |
| Raw frequency | 37 |
| Normalized frequency | 0.489 |
| Modifier score | 0.700 |
| Perplexity | 216.465 |