Asiduity or Assiduity: How To spell?
The word Asiduity is misspelled against Assiduity, a noun meaning "Constant or close application or attention, particularly to some business or enterprise; diligence."
Assiduity has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings a & iduity which should not be misspelled with single 'S'
Wrong Spelling:  a-s-iduity  Correct Spelling:  a-ss-iduity 
Check more misspelled words of Assiduity to spell it correct.