| separately | 10 | manner |
| monthly | 10 | temporal |
| in the form of a surcharge | 9 | other |
| fee → be → invoiced | 137 |
| fee → be invoiced → payable | 12 |
| fee → be invoiced to → customer | 8 |
| fee → be invoiced to → the customer | 5 |
| fee → be paid on → receipt of invoice | 3 |
| fee → be sent as → invoice | 3 |
| negative | neutral | positive |
| 0.140 | 0.824 | 0.035 |
| Raw frequency | 168 |
| Normalized frequency | 0.516 |
| Modifier score | 1.000 |
| Perplexity | 40.490 |