| at the same concentrations | 2 | location |
| urea → be found in → urine | 11 |
| urea → be in → urine | 3 |
| urea → be found in → human and mammalian urine | 3 |
| negative | neutral | positive |
| 0.223 | 0.683 | 0.094 |
| Raw frequency | 17 |
| Normalized frequency | 0.621 |
| Modifier score | 0.500 |
| Perplexity | 130.914 |