Once in a Day, Twice in an Hour, Thrice in a Minute…What’s it?

Puzzle is a twisting game. The guy who’s capable to solve the puzzle became a genius. Lest see whether you are a “genius”.. Here goes the Puzzle…” Once in a Day, Twice in an Hour, Thrice in a Minute…What’s it?”

• Solution:
  Every day has 24 hours and each hour has 60 minutes..
  Now, think what could be the answer for the puzzle?
  I give you a clue, think it Logically..
  D A Y=============A
  H O U R===========O U
  M I N U T E ======= I U E
• So the Answer is “VOWELS”