Perennialy or Perennially: How To spell?
The word Perennialy is misspelled against Perennially, an adverb meaning "In a perennial manner."
Perennially has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings perennia & y which should not be misspelled with single 'L'
Wrong Spelling:  perennia-l-y  Correct Spelling:  perennia-ll-y 
Find more wrongly spelled words of Perennially to spell it well.