Readability classes, number of documents, tokens per specific readability class, and average tokens per document in each readability corpus.
| Readability class . | #documents . | #tokens . | #tokens per doc. . |
|---|---|---|---|
| Wikipedia | |||
| simple | 130,000 | 10,933,710 | 84.11 |
| balanced | 130,000 | 10,847,108 | 83.44 |
| normal | 130,000 | 10,719,878 | 82.46 |
| OneStopEnglish | |||
| beginner | 189 | 100,800 | 533.33 |
| intermediate | 189 | 127,934 | 676.90 |
| advanced | 189 | 155,253 | 820.49 |
| All | 567 | 383,987 | 677.23 |
| WeeBit | |||
| age 7–8 | 600 | 77,613 | 129.35 |
| age 8–9 | 600 | 100,491 | 167.49 |
| age 9–10 | 600 | 159,719 | 266.20 |
| age 10–14 | 600 | 89,548 | 149.25 |
| age 14–16 | 600 | 152,402 | 254.00 |
| All | 3,000 | 579,773 | 193.26 |
| Newsela | |||
| 2nd grade | 224 | 74,428 | 332.27 |
| 3rd grade | 500 | 197,992 | 395.98 |
| 4th grade | 1,569 | 923,828 | 588.80 |
| 5th grade | 1,342 | 912,411 | 679.89 |
| 6th grade | 1,058 | 802,057 | 758.09 |
| 7th grade | 1,210 | 979,471 | 809.48 |
| 8th grade | 1,037 | 890,358 | 858.59 |
| 9th grade | 750 | 637,784 | 850.38 |
| 10th grade | 20 | 19,012 | 950.60 |
| 11th grade | 2 | 1,130 | 565.00 |
| 12th | 1,853 | 1,833,781 | 989.63 |
| All | 9,565 | 7,272,252 | 760.30 |
| KRES-balanced | |||
| balanced | / | 2,402,263 | / |
| Slovenian SB | |||
| 1st-ps | 69 | 12,921 | 187.26 |
| 2nd-ps | 146 | 30,296 | 207.51 |
| 3rd-ps | 268 | 62,241 | 232.24 |
| 4th-ps | 1,007 | 265,242 | 263.40 |
| 5th-ps | 1,186 | 330,039 | 278.28 |
| 6th-ps | 959 | 279,461 | 291.41 |
| 7th-ps | 1,470 | 462,551 | 314.66 |
| 8th-ps | 1,844 | 540,944 | 293.35 |
| 9th-ps | 2,154 | 688,149 | 319.47 |
| 1st-hs | 1,663 | 578,694 | 347.98 |
| 2nd-hs | 590 | 206,147 | 349.40 |
| 3rd-hs | 529 | 165,845 | 313.51 |
| 4th-hs | 45 | 14,313 | 318.07 |
| All | 11,930 | 3,636,843 | 304.85 |
| Readability class . | #documents . | #tokens . | #tokens per doc. . |
|---|---|---|---|
| Wikipedia | |||
| simple | 130,000 | 10,933,710 | 84.11 |
| balanced | 130,000 | 10,847,108 | 83.44 |
| normal | 130,000 | 10,719,878 | 82.46 |
| OneStopEnglish | |||
| beginner | 189 | 100,800 | 533.33 |
| intermediate | 189 | 127,934 | 676.90 |
| advanced | 189 | 155,253 | 820.49 |
| All | 567 | 383,987 | 677.23 |
| WeeBit | |||
| age 7–8 | 600 | 77,613 | 129.35 |
| age 8–9 | 600 | 100,491 | 167.49 |
| age 9–10 | 600 | 159,719 | 266.20 |
| age 10–14 | 600 | 89,548 | 149.25 |
| age 14–16 | 600 | 152,402 | 254.00 |
| All | 3,000 | 579,773 | 193.26 |
| Newsela | |||
| 2nd grade | 224 | 74,428 | 332.27 |
| 3rd grade | 500 | 197,992 | 395.98 |
| 4th grade | 1,569 | 923,828 | 588.80 |
| 5th grade | 1,342 | 912,411 | 679.89 |
| 6th grade | 1,058 | 802,057 | 758.09 |
| 7th grade | 1,210 | 979,471 | 809.48 |
| 8th grade | 1,037 | 890,358 | 858.59 |
| 9th grade | 750 | 637,784 | 850.38 |
| 10th grade | 20 | 19,012 | 950.60 |
| 11th grade | 2 | 1,130 | 565.00 |
| 12th | 1,853 | 1,833,781 | 989.63 |
| All | 9,565 | 7,272,252 | 760.30 |
| KRES-balanced | |||
| balanced | / | 2,402,263 | / |
| Slovenian SB | |||
| 1st-ps | 69 | 12,921 | 187.26 |
| 2nd-ps | 146 | 30,296 | 207.51 |
| 3rd-ps | 268 | 62,241 | 232.24 |
| 4th-ps | 1,007 | 265,242 | 263.40 |
| 5th-ps | 1,186 | 330,039 | 278.28 |
| 6th-ps | 959 | 279,461 | 291.41 |
| 7th-ps | 1,470 | 462,551 | 314.66 |
| 8th-ps | 1,844 | 540,944 | 293.35 |
| 9th-ps | 2,154 | 688,149 | 319.47 |
| 1st-hs | 1,663 | 578,694 | 347.98 |
| 2nd-hs | 590 | 206,147 | 349.40 |
| 3rd-hs | 529 | 165,845 | 313.51 |
| 4th-hs | 45 | 14,313 | 318.07 |
| All | 11,930 | 3,636,843 | 304.85 |