| Typicality: | 0.347 |
| Saliency: | 0.229 |
| by sidney katz | 7 | other |
| originally | 4 | other |
| to replace pneumatic systems | 2 | purpose |
| concept → be proposed in → the 1950s | 4 |
| concept → arise in → late 1950s | 3 |
| concept → be introduced in → the 1950s | 3 |
| concept → be popularized in → late 1950s | 3 |
| negative | neutral | positive |
| 0.081 | 0.790 | 0.129 |
| Raw frequency | 13 |
| Normalized frequency | 0.229 |
| Modifier score | 0.500 |
| Perplexity | 31.755 |