Octemeron or Octaemeron: How To spell?

The word Octemeron is misspelled against Octaemeron, a noun meaning "A fast of eight days before a great festival."

Octaemeron has vowels 'ae' together mispronounced as 'e'
Word contains consecutive vowels 'AE' in between alphabets oct & meron is misspelled as 'E'
Wrong Spelling:  oct-e-meron 
Correct Spelling:  oct-ae-meron 
Find more incorrect spellings of Octaemeron to spell right way.

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