Some examples of letter frequency rankings in English:
David Copperfield etaoinhsrdlmuwycfgpbvkxjqz
Pride and Prejudice etaoinhsrdlumcywfgbpvkzjxq
Wuthering Heights etaonihsrdlumcyfwgpbvkxjqz
Vanity Fair etaonhsirdlumcwfgypbvkjqxz
Gulliver's Travels etoainshrdlmucfwygpbvkxjqz
Alice in Wonderland etaoihnsrdluwgcymfpbkvqxjz
Inaugural speeches:
Reagan etonarishdlumwcfgpybvkjxzq
Obama etoarnsihdlucwfmgpybvkjqzx
British National Corpus etaoinsrhldcumfpgwybvkxjqz
(90 million words of UK English)
Brown corpus etaoinsrhldcumfpgwybvkxjqz
(one million words of US English)
Linotype keyboard
e s c v x
t h m b z
a r f g fi
o d w k fl
i l y q ff
n u p j ffi
French: esaitnrulodmcpv e' qfgbhj a` x e` y e^ z c, o^
u` a^ u^ i^ oe k w i" e" u" ae n~
(novels, 500000 words; Engwall 1984)
esaitnrulodcmp e' vqfbghj a` x e` y e^ z a^ c,
i^ u` o^ u^ i" k e" w
(TLF, 70 million words; Brunet 1981)
Modern Greek: aoietsnEurpkmlOdg ch th ph v x z ps
(Hellenic National Corpus, 33 million words)
Norwegian: erntsilakodgmvfupbh o/ j y aa ae c w z x (q)
(newspapers, one million words; Heggstad 1982)
Swedish: eantrsildomkgv a" fhup aa o" bcyjxwz e' q ...
(newspapers, one million words; Allen 1970)
Icelandic: anriestu dh lgmkfhvo a' th i' d j o' b y ae u'
o" p e' y' c x w z q
(500000 words; Magnusson, Briem 1991)
Hungarian: eatlnskomzrig a' e' ydbvhj o: f u p o" o' c u:
i' u' u" x w (q)
(fiction, 500000 words; Furedi, Kelemen 1989)
Slovak: aoesnitrvlkdmcupzyhjgfb (qwx)
(disregarding diacritics; 200000 words; Mistrik 1985)
Also, but sometimes from limited samples:
Spanish: aeosrnlidtucmpbhy i' gvq o' jfz e' a' n~ x u' k (w)
(novel, 44000 words)
aeosrnlidutcpmvgbfyhq o' j i' a' z n~ e' x u' k w
(news, 1700 words)
Polish: iaeoznscrwymtdpk l/ ujlg e, b a, h z. s' o' c' n' f z' vqx
(novel, 80000 words)
aieonzwscrytkdpmjul l/ g b h a, e, o' z. s'
c' n' f z' x v (q)
(news, 11000 words)
Finnish: aintesl a" koumhrvpjyd o" gfbcx (qwz)
(novel, 31000 words)
enatrsildokgmvf aa uph a" cb o" jyxzw (q)
(news, 1300 words)
Portuguese: aeosrinmdutlcphvqgfb a~ z c, j a' e' x o' o~ e^ o^
a` y i' e` u' o` (kw)
(novel, 27000 words)
aeosridntmucplvgfbhq a~ c, a' e' i' z j o' e^ x
a` o~ y u' k a^ o^ w
(news, 4500 words)
Dutch: enairtodsglhkmvjzwupbcf e' y o' x c, e" i" q u" e` o^ o"
(novel, 42000 words)
enatriodslghvkmwubpjczfyx e" e' o' (q)
(news, 2900 words)
Esperanto: iaeonslrtkmjudpvgfb g^ c^ u~ c s^ h z j^ w y x (q)
(Robinsono Kruso, 21000 words)
aieonslrtkjudmpvgfb s^ g^ c u~ c^ z h j^ (qwxy)
(5600 words)
Czech: eonatvs i' ilmdhcujrkzp a' y e^ b s^ z^ e' r^ y' c^
u. n^ u' g t' f o' x d' (qw)
(14000 words)
oeantivlsrdkup i' m c h a' z y j b r^ e^ e' c^
z^ y' s^ u~ g f u' n^ w d' o' x t' (q)
(news, 2500 words)
Danish: enadtrslgiohmkvufbp o/ ae jyc e' xqw e` z
u" a` o' e^ c, aa e" a"
(novel, 52000 words)
erntdasilgomkvfhubp aa ae j o/ y c w z
... x ... q
(14000 words)
Hawaiian: a i k o ' e n u h l m a^ p o^ w e^ u^ i^ (bcdfgjqrstvxyz)
(12000 words)
Maori: aiketonuhrmwgp (bcdfjlqsvxyz)
(2000 words)
Class. Greek: aeiontsu e^ kprml o^ d th g ch ph x b z ps
(Thucydides, 23000 words)
aeoitnsurpkl e^ o^ mdg th ch ph b x z ps
(Xenophon, 10000 words)
Russian: oeanitslvrkdmup ya soft y g b ch z zh j sh kh
yu e shch ts f hard yo
(Anna Karenina, 280000 words)
oeaintsvlrkdmpuy soft ya g b z ch j kh zh sh
yu ts shch e f hard (yo)
(Solzhenitsyn, 86000 words)
oeaintsrvlkmdpuy ya soft g z b ch j zh kh yu
sh ts shch e f hard yo
(news, 25000 words)
Turkish: aeinrlIkdtmsyuob u" s, zgvhc g~ c, p o" f j w x q
(news, 73000 words)
aeinlrIdktsymuob u" s, zgvhp c, g~ c o" f j w q x
(news, 17000 words)
Latin: eituasrnomcpldqbgvfhxyk (z) (jw)
(Caesar, 52000 words)
ietuasnmorcdlpqvbgfhxyz (k) (jw)
(Seneca, 18000 words)
eiuatsrnmocldpqbgfvxhyz (k) (jw)
(Livy, 17000 words)
Italian: aeiolnrtscdupmvgfbzhq o` a` u` i` e' e` o'
y k w x j o^
(37000 words)
German: enirsahtduclgmobwfkzv u" p a" ss j o" y q x ...
(Effi Briest, 32000 words)
enisrthdaulcgmowbfzkv u" p a" o" j y x q
(Nietzsche, 72000 words)
enirtsadhlucmgobfwkpzv a" u" o" ss j y x q
(science, 4600 words)
Welsh: ayndreiloghwtfuscmbp a^ o^ y^ w^ j i" e^ a'
q v i^ (kxz)
(government document, 13000 words)
Irish: aihnretscoldgumb a' f i' e' u' o' pvjwykqz (x)
(news, 5400 words)
ainhrtesocldgmub i' a' f e' p u' o' yvkwjq (xz)
(news, 3400 words)
Gaelic: aihndercsgloutmb a` f p o` u` e' i` e` o' (jkqvwxyz)
(1400 words)