| regularly | 6 | degree |
| for in fact | 4 | cause |
| more frequently than other types | 3 | other |
| mattress → be → changed | 40 |
| mattress → need → change | 4 |
| negative | neutral | positive |
| 0.291 | 0.611 | 0.097 |
| Raw frequency | 44 |
| Normalized frequency | 0.380 |
| Modifier score | 0.660 |
| Perplexity | 199.928 |