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