Propeller Opera - Volume 1 - Statistics

Coverage

This shows how much text coverage you'll have if you know the most X frequent words in that work.

Vocabulary Coverage

Milestones

80% Coverage

1,715 words

85% Coverage

2,478 words

90% Coverage

3,682 words

95% Coverage

5,773 words

98% Coverage

7,664 words

99% Coverage

8,295 words

Total Words

8,925

Difficulty Progression

Shows how the difficulty changes as you progress through the book.

Progress	Difficulty	Peak
0%	3.96/5	4.57/5
10%	4.19/5	4.68/5
20%	3.30/5	4.10/5
30%	3.69/5	4.40/5
40%	3.89/5	4.56/5
50%	4.02/5	4.61/5
60%	4.30/5	4.72/5
70%	4.25/5	4.70/5
80%	4.13/5	4.66/5
90%	3.68/5	4.43/5
Overall	4.00/5	4.60/5

Deciles

Shows the difficulty level at or below which X% of the text falls.

10%

2.43/5

20%

3.04/5

25%

3.22/5

30%

3.38/5

40%

3.70/5

50%

4.00/5

60%

4.21/5

70%

4.41/5

80%

4.60/5

90%

4.80/5

Overall Difficulty

4.00/5

Peak Difficulty

4.60/5