Planing or Planning: How To spell?
The word Planing is misspelled against Planning, which is present continuous of "Plan"
Planning has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings pla & ing which should not be misspelled with single 'N'
Wrong Spelling:  pla-n-ing  Correct Spelling:  pla-nn-ing 
Find more wrongly spelled words of Planning to spell it well.