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. 2020 Apr 23;8(4):e17642. doi: 10.2196/17642

Table 3.

Overview of the entire corpus and the test collection.

Corpus Number Total word count Word count, mean (SD) Unique word count
Entire corpus 88,746 40,797,062 490 (387) 270,591
Test collection 100 71,905 719 (462) 10,707