| at 50 years of age | 4 | temporal |
| adult → need → booster | 8 |
| adult → get → booster | 5 |
| adult → receive → booster | 4 |
| adult → require → booster | 3 |
| negative | neutral | positive |
| 0.276 | 0.647 | 0.078 |
| Raw frequency | 20 |
| Normalized frequency | 0.339 |
| Modifier score | 1.000 |
| Perplexity | 139.751 |