What is that which is seen twice in "everyday" and four times in "every week", yet only once in a year?

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the answer is the letter "e".

it's the letter "e"

HEHE EASY

LETTER "E"

the letter "e".

The letter “e”

same with the upstairs' answer

LETTER "E" in the word[1_09]

You're all talents!

yes ,the answer is "E" . is so difficult for me .

the letter"e".{:soso_e100:}

什么是所见的两次”和“每一天,她说:“每星期四次,但只有一次”的一年。