In order: e, t, a, o, i, n, s, h, r, d, l, u
Yes, letters were the most common form of communication.
the letters a and o.
s
Smith Jones
sewn and news are the probably the most common words.
E is the most common, with T coming in second and A third.
Of course The letters that they give you are the most common to be used. Then you choose your own
It depends on which alphabets you are talking about. In the latin alphabet for English, the most common letter is E, and the least common is Z.
The most common conjunctive phrases in Spanish are only one or two letters long. These are y, e, ni, u and o.
AE and AI are the most likely (12 As, 9 Es, 9 Is) OE is also very common (12 Es, 8 Os)
The correct and most used and common one is Dear
Some letters such as e is a number, and i stands for imaginary number. But most letters are variables. x is a common variable. A variable is basically a number that you don't know so you just call it x.