Sexenially or Sexennially: How To spell?
The word Sexenially is misspelled against Sexennially, an adverb meaning "Once in six years."
Sexennially has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings sexe & ially which should not be misspelled with single 'N'
Wrong Spelling:  sexe-n-ially  Correct Spelling:  sexe-nn-ially 
Find more wrongly spelled words of Sexennially to spell it well.