Quinquenium or Quinquennium: How To spell?

The word Quinquenium is misspelled against Quinquennium, a noun meaning "Space of five years."

Quinquennium has double "nn" is mispronounced as "n"
Remember double 'NN' in between the strings quinque & ium which should not be misspelled with single 'N'
Wrong Spelling: quinque-n-ium
Correct Spelling: quinque-nn-ium
Check more misspelled words of Quinquennium to spell it correct.