Plyistocene or Pleistocene: How To spell?

The word Plyistocene is misspelled against Pleistocene, a noun meaning "The Pleistocene epoch, or deposits."

Word contains consecutive vowels 'EI' in between alphabets pl & stocene is misspelled as 'YI'
Wrong Spelling:  pl-yi-stocene 
Correct Spelling:  pl-ei-stocene 
Find more incorrect spellings of Pleistocene to spell right way.