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Table 2 Character frequencies for the quotes used in the experiment and for the Python computer code

From: How to optimize switch virtual keyboards to trade off speed and accuracy

 

Frequency

 

Frequency

 

Frequency

 

Frequency

Char

Quotes

Python

Char

Quotes

Python

Char

Quotes

Python

Char

Quotes

Python

space

5,346

1,980

p

415

142

:

9

57

} or #

0

30

a

1,764

211

q

19

7

∧

0

0

[

0

65

b

370

54

r

1,385

428

&

0

1

]

0

65

c

800

132

s

1,655

198

*

0

649

-

325

13

d

758

171

t

2,076

271

(

0

113

_

0

91

e

2,876

297

u

827

117

)

0

113

∼

0

0

f

521

76

v

306

48

;

7

0

0

5

100

g

503

48

w

552

42

’

108

70

1

1

80

h

1,138

49

x

23

62

?

15

0

2

2

29

i

1,803

204

y

620

58

+

0

22

3

0

7

j

61

17

z

29

2

=

0

81

4

0

13

k

223

56

!

4

3

<

0

8

5

0

24

l

1,089

109

@

0

1

>

0

3

6

0

19

m

590

167

,

165

101

/

0

21

7

0

12

n

1,680

213

.

434

152

∖

0

2

8

1

4

o

1,995

245

%

2

15

{ or ″

0

244

9

1

6