| during the past fifty years | 5 | temporal |
| from the perspective of the inventor | 5 | other |
| often | 3 | temporal |
| invention → be → made | 128 |
| invention → be → created | 14 |
| invention → be → invented | 6 |
| invention → be → produced | 5 |
| invention → be → formed | 4 |
| negative | neutral | positive |
| 0.143 | 0.723 | 0.134 |
| Raw frequency | 157 |
| Normalized frequency | 0.986 |
| Modifier score | 0.825 |
| Perplexity | 198.672 |