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Clinical token corpus statistics.
| Number of clinical notes | 2 692 451 |
| Number of tokens | 159 236 294 |
| Unique tokens | 700 475 |
| (GS) Unique “canonical” tokens (length 4) | 256 005 |
| (GS) Unique typographical errors | 51 337 |
| Unique tokens in ontology concepts | 6862 |
| Ontology tokens in gold standard | 4769 |
| Ontology tokens with typographical errors | 3858 |
