| properly | 12 | manner |
| down the trachea | 10 | location |
| usually | 8 | degree |
| catheter → be → placed | 240 |
| catheter → be put in → place | 10 |
| catheter → be → installed | 7 |
| catheter → be → fitted | 6 |
| catheter → be put into → place | 3 |
| catheter → be → put | 3 |
| negative | neutral | positive |
| 0.203 | 0.729 | 0.068 |
| Raw frequency | 269 |
| Normalized frequency | 0.748 |
| Modifier score | 0.792 |
| Perplexity | 101.020 |