| to calm pain | 11 | purpose |
| to muscle spasm | 5 | purpose |
| during physical therapy after surgery | 4 | temporal |
| therapist → use → heat | 51 |
| therapist → use → heat therapy | 7 |
| therapist → use → the heat | 3 |
| negative | neutral | positive |
| 0.063 | 0.833 | 0.104 |
| Raw frequency | 61 |
| Normalized frequency | 0.578 |
| Modifier score | 0.400 |
| Perplexity | 425.647 |