numbers_letter_count.rb

# A simple, stupid script that counts how many times a letter occurs 
# in the english translation of each number from 0 to MAX_NUM.
# Doesn't include the joining word "and" in numbers like "one hundred and two"
#
# NOTE: You need to install two gems to run this script:
# * loggability (linguistics depends on it but doesn't install it as a dependency for some reason)
# * linguistics
require 'linguistics'
Linguistics.use(:en)

MAX_NUM = 999_999

# String of all the wordified numbers with all " and " and non-word 
# characters stripped out.
# This method takes a long time to perform.
str = (0...MAX_NUM).map { |n| n.en.numwords }.join.gsub(/ and /, "").gsub(/\W/, "")

# Loop through each letter, scan the string for it, and output its frequency.
%w{a b c d e f g h i j k l m n o p q r s t u v w x y z}.each do |l| 
  puts "#{l}: #{str.scan(l).size}"
end

result

a: 998999
b: 0
c: 0
d: 4598995
e: 6319993
f: 1420000
g: 600000
h: 3998997
i: 2619994
j: 0
k: 0
l: 40000
m: 0
n: 5358985
o: 2359000
p: 0
q: 0
r: 2999999
s: 2198999
t: 4338997
u: 3198997
v: 1020000
w: 600000
x: 600000
y: 1599998
z: 1