WHAT IS THE SECOND MOST USED LETTER IN THE ENGLISH LANGUAGE RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

The time and date will be 01:01:01 on 01/01/01. Did you answer this riddle correctly?
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River Dixon. We know his name is river, so 500 being D in Roman numerals, 10 being X, 1 being I, and an is the fourteenth letter of the alphabet. D at the start, X in the middle, in the middle of those two is I, so that spells DIX, near the end is none/0, which is like an O so that's DIXON. Then to the left of that is River so, RIVER DIXON. Did you answer this riddle correctly?
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Sign language Did you answer this riddle correctly?
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Alone.

Behead me and I am Lone.
Behead me again and I am One. Did you answer this riddle correctly?
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Short Did you answer this riddle correctly?
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Snake Did you answer this riddle correctly?
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Password Did you answer this riddle correctly?
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QT. Did you answer this riddle correctly?
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Four. The number four has four letters, making it self-enumerating. Did you answer this riddle correctly?
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C and Y Did you answer this riddle correctly?
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Short. Adding 'er' to short gives you shorter. Did you answer this riddle correctly?
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They read the same right side up and upside down. Did you answer this riddle correctly?
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Four Did you answer this riddle correctly?
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A bee (B) comes after it! Did you answer this riddle correctly?
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Japan, China, Nepal, India Did you answer this riddle correctly?
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